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1992

MONTANA STATE LIBRARY

Lirr, ni?15 E. Sth AVE.

WELENA, MONTANA 59620

STATUS REPORT: BULL TROUT IN

MONTANA

AUGUST, 1992

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Prepared by:

Ginger Thomas, Consultant

502 Livingston Avenue

Mi^ula, MT 59801

Prepared ton

Montana Department of

Fish, Wildlife and Parks

1420 E. 6th Ave

Helena, MT 59620

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AUG a

FEB 4 2002

ACKNOWLEDGEMENTS

I would like to thank the many people who generously donated their time, effort,
and knowledge to this project. Thanks to Tom Weaver, Janet Decker-Hess, Scott
Rumsey, Don Peters, Rod Berg, Eric Priest, Ron Pierce, Doug Perkinson, L^e Brundm,
Len Walch, Wayne Hadley, Chris Clancy, Dale Hoth, Dick Kramer, Kate Walker,
Robbin Wagner, Robb Leary, Kathy Knudsen, Kevin Sage, Rick Stowell, Brad Shepard,
Leo Marnell, Brian Marotz, Mike Enk, Laney Hanzel, Jim Vashro, Joe DosSantos and
Denise Vore. Special thanks to Chris Hunter for making this project happen.

TABLE OF CONTENTS

Introduction

Life history of bull trout * • ■ }

Life history patterns ^

Reproduction ^

Spawning site preferences •

Spawning behavior ^

Fecundity ^

Egg deposition to emergence ^

Sources of mortality ^

Juvenile behavior and habitat needs • ^

Habitat preferences ^

Food habits

Migration ^

Sources of mortality ■ • • ^

Adult behavior and habitat needs ^

Habitat preferences in rivers ^

Habitat preferences in lakes ^

Migration ^

Age and growth ^

Food habits

Parasites

Sensitivity to environmental disturbance ^

Genetic factors ^

Environmental and life history characteristics 1"

Introductions of non-native species 1^

Intentional and unintentional eradication . 12

Status of bull trout in Montana - overview of the state 13

Historic distribution 1^

Current distribution 1^

Methods • 1^

Distribution of bull trout in Montana 28

Status of bull trout in Montana - by hydrologic unit 31

Hydrologic unit # 17010101 - The Kootenai River (not including the Yaak

drainage or the Fisher River) 31

Historic distribution 31

Current distribution 31

Hydrologic unit # 17010102 - the Fisher River 33

Historic distribution 33

33
Current distribution

Hydrologic unit # 17010103 - the Yaak River ^^

Historic distribution .

Current distribution ," v ' u

Hydrologic unit # 17010104 - Kootenai River from Idaho to the Yaak

River ^^

Historic distribution •

Current distribution • • •.

Hydrologic unit # 17010201 - the Clark Fork River from Warm Spnngs
Creek to the Blackfoot River, not including Rock Creek and Flmt

Creek - .

Historic distribution

Current distribution •

Hydrologic unit # 17010202 - Rock Creek and Hint Creek dramages 34

Historic distribution

Current distribution

Hydrologic unit # 17010203 - the Blackfoot River dramage ^^

Historic distribution

Current distribution ' ' ' * V." u * J

Hydrologic unit # 17010204 - the Clark Fork River from the Flathead

River to the Blackfoot River ^'

Historic distribution

Current distribution

Hydrologic unit # 17010205 - the Bitterroot River drainage ^»

Historic distribution

Current distribution

The Upper Flathead River system above Kerr Dam ^^

Status of bull trout in Glacier National Park ^^J

Bull trout management on the Flathead National Forest 41

Hydrologic unit # 17010206 - the North Fork of the Flathead River 42

Historic distribution

Current distribution '''' '^ ^.' " ' An

Hydrologic unit # 17010207 - the Middle Fork of the Flathead River 43

Historic distribution

Current distribution r^' J ' a' " '

Hydrologic unit # 17010208 - Flathead Lake and the mainstem Flathead ^^

River above Flathead Lake

Historic distribution

Current distribution ". * ' ' "t^ .' ao

Hydrologic unit # 17010209 - the South Fork of the Flathead River 49

Historic distribution

Current distribution

Hydrologic unit # 170101210 - the Stillwater River drainage ^^

Historic distribution

Current distribution ^^

Hydrologic unit # 17010211 - the Swan River drainage 51

Historic distribution 51

Current distribution 51

Hydrologic unit # 17010212 - the Flathead River below Flathead Lake ..... 54

Historic distribution 54

Current distribution 55

Hydrologic unit # 17010213 - the Clark Fork River below the Flathead

River ^^

Historic distribution 55

Current distribution 56

Hydrologic unit #10010002 - St Mary's River drainage 56

Historic distribution 56

Current distribution ^ '

Summary and conclusions -^ '

Literature Cited ^^

Appendix A ^

T JST OF TABLES

Table 1. Relative abundance of bull trout, by hydrologic unit. Numbers refer to

the number of reaches

Table 2. # Stream Reaches With Use Codes: 19

Table 3. # Reaches With Genetic Codes: 21

Table 4. # Reaches With Habitat Codes: 23

Table 5. Criteria For The Risk Of Extinction 25

Table 6. Risk Of Extinction, By Hydrologic Unit 26

Table 7. Number of reaches and number of miles of stream containing bull trout

29
in Montana

Table 8. Summary of the North Fork of the Flathead River bull trout spawning

site inventories from 1979-1991 in the stream sections monitored annually. . . 44

Table 9. Summary of the number of bull trout redds observed in the U.S. portion

of the North Fork of the Flathead drainage during basin-wide survey years. . 45

Table 10. Summary of Middle Fork of the Flathead River bull trout spawning site

inventories from 1979-1991 in the stream sections monitored annually 47

Table 11 - Results of basinwide bull trout redd counts conducted in the Middle

Fork of the Flathead River ^^

Table 12. Summary of Swan drainage bull trout spawning site inventories from 1982-1991
in the stream sections monitored annually (Rumsey 1991) • • 53

Table 13. Bull trout redd counts from Swan drainage randomly monitored

streams (Rumsey 1991)

Introduction

In October, 1991, the Montana Department of Fish, Wildlife, and Parks
contracted with Ginger Thomas, a fisheries consultant, to prepare a status report on bull
trout r Salvelinus confluentus Suckley) within the state of Montana. The purpose of this
report is to summarize the life history and habitat requirements of bull trout. In
addition, Montana bull trout populations are identified and characterized as to life
history, status, habitat needs, and limiting factors. The report also includes a discussion
of historic vs current occurrence and the genetics of bull trout.

Increasing concern about the status of bull trout was the impetus for this report.
Bull trout are listed as a species of special concern by the Montana Department of Fish,
Wildlife, and Parks and the American Fisheries Society and as a "sensitive species" by the
U.S. Forest Service. They are also listed as a Category 2 species by the U.S. Fish and
Wildlife Service. This indicates that a proposal to list the species as threatened or
endangered may be appropriate, but that evidence is inconclusive. The Oregon Chapter
of the American Fisheries Society recently voted to petition the U.S. Fish and Wildlife
Service for a status review of the bull trout in the state of Oregon under the provisions of
the Endangered Species Act.

Life history of bull trout

Life history patterns

The bull trout in Montana is identified as having three life history patterns -
resident, fluvial, and adfluvial. (Anadromous bull trout have been reported in coastal
streams, but none are found in Montana). Resident bull trout spend their entire lives m
the same (or nearby) streams in which they were hatched. Resident bull trout adults and
juveniles generally confine their migrations to their natal streams. In fluvial and adfluvial
populations, the aduhs spawn in tributary streams where the young rear for one to four
years (Fraley and Shepard 1989). The juvenile bull trout then migrate to either a lake
(adfluvial fish) or a river (fluvial fish), where they grow to maturity.

Resident bull trout populations may be isolated from others by some physical
barrier. Members of resident stocks tend to mature at an early age, are smaller in size
than migratory populations, and have low fecundity (Willamette National Forest 1989).

Most of the published information on bull trout has been gathered on migratory
populations. Details of the life history of resident bull trout are largely unreported. The
following life history description refers to adfluvial and fluvial bull trout unless otherwise
stated.

Reproduction

Bull trout spawning generally takes place during September and October.
Initiation of spawning is correlated with declining water temperatures. The threshold
temperature appears to be 9°C. When the daily maximum temperature drops below this
level spawning begins (Fraley and Shepard 1989, McPhail and Murray 1979). Spawnmg
takes place primarily at night (Heimer 1965, Weaver and White 1985) although m the
upper Flathead system, spawning has been observed in the daylight hours later m the
spawning run (Weaver pers. comm. 1992).

Not all adult bull trout spawn annually. Fraley and Shepard (1989) reported that
approximately 57% of the aduh bull trout population left Flathead Lake each spring and
summer to spawn. However, repeat spawning has also been documented for bull trout.
In the upper Flathead system, Montana, bull trout have been observed spawning every
year, every other year, and every third year (Weaver pers. comm. 1992).

Spawning site preferences

Bull trout spawners select areas in the stream channel characterized by loose
gravel substrates and low gradient. Groundwater inflow and proximity to cover are also
significant factors influencing spawning site selection (Fraley and Shepard 1989). Runs or
tails of pools with water 0.2 - 0.8 m deep may be used for spawning. Water velocities
associated with redds are 0.2 - 0.6 m/s. Eggs are buried 100 - 200 mm in the gravel
(Pratt 1992). Bull trout spawners tend to use larger, higher order (3rd - 5th order)
tributaries. These specific requirements tend to limit the available spawning area for bull
trout In the upper Flathead system, only 28% of the 750 km of available salmonid
spawning habitat is used for bull trout spawning (Fraley and Shepard 1989). In the
Swan River drainage over 75% of the bull trout spawning takes place in 8.5% of the
available habitat (Leathe and Enk 1985, Rumsey 1991). Again, this information was
collected on fluvial and adfluvial populations. Resident bull trout may have different
spawning site preferences.

Spawning behavior

Female bull trout choose the spawning site and construct the redd, while the male
defends the area. The female digs the redd with an up and down tail action, moving m
an upstream direction (Scott and Grossman 1973). Redd super-imposition has been
noted in several areas (Heimer 1965, Ratliff 1987). After spawning, the spent adults of
migratory populations move out of the tributaries downstream to either a large nver or
lake (Fraley and Shepard 1989).

Precocious males, "jacks", have been recorded in several localities. In the Upper
Arrow Lakes, British Golumbia, "jack" bull trout entered tributary streams while still

green and left without spawning (McPhail and Murray 1979). Shepard and Graham
(1983) noted precocious males actively spawning with larger females and eating eggs.

Fecundity

Fecundity of females varies with fish size. Fraley and Shepard (1989) reported an
average of 5,482 eggs per female in the Flathead drainage of Montana, with one 6.8 kg
bull trout containing over 12,000 eggs. Bull trout in Arrow Lakes, British Columbia were
smaller with an average of less than 2,000 eggs per female (McPhail and Murray 1979).

Egg deposition to emergence

Incubation time and survival to emergence are partially dependent on
temperature. McPhail and Murray (1979) reported the best survival of bull trout embryos
at temperatures of 2 - 4°C. They found the lowest survival rates at temperatures of 8 to
10°C (0 to 20% survival). Weaver and White (1984) also observed increased incubation
mortality above 8°C in laboratory tests. Survival to emergence was higher in 4 - 6°C
water.

Bull trout require 350-440 temperature units (°C) to hatch (Weaver and White
1984, Gould 1987). In general, bull trout eggs hatch within 100 - 145 days after
deposition, usually by the end of January. Fraley and Shepard (1989) reported that bull
trout fry emerged from the gravel 635 temperature units (223 days) after deposition.
The alevins remain in the gravel and absorb the yolk sac, with the first fry appearing in
mid-April. Weaver (pers. comm. 1992) reports that in three years of study, bull trout
time to emergence has ranged from 219 - 225 days, with first emergence occurring in late
April - early May.

In the upper Flathead system, Montana, when bull trout emerge from the gravel
they range in size from 23 - 28 mm, and more than double their length in their first
summer of growth (Fraley and Shepard 1989). Bull trout are found to feed while still in
the gravel (McPhail and Murray 1979).

Sources of mortality

The amount of fine materials in the substrate and extreme streamflows are
common causes of mortality to bull trout eggs and alevins . Weaver and Fraley (1991)
found a significant inverse relationship between the percent of the substrate < 6.35 mm
in diameter and emergence success. Approximately 33% survival to emergence can be
expected in situations where 35% of the substrate is < 6.35 mm. The authors concluded
that any increases in fine materials in spawning areas could significantly reduce the
emergence success of bull trout fry.

Extreme high flows can scour out gravels and cause egg mortality. Conversely,
high flows may liberate fry that would otherwise be entombed by fines (Weaver pers.
comm. 1992). Low flows can expose redds and result in freezing (Weaver and White
1985).

Juvenile behavior and habitat needs

Habitat preferences

The distribution of juvenile bull trout is influenced by temperature. They are
rarely found in streams with maximum summer water temperatures exceeding 15°C
(Fraley and Shepard 1989). In the Pend Oreille basin, bull trout were found in highest
density in streams with cold spring influences and a closed forest canopy, resulting in
cooler temperatures (Pratt 1985). Juvenile bull trout have been observed in cold
tributaries where no spawning has ever been documented. It has been speculated that
they may migrate to these streams during high spring flows (Weaver pars. comm. 1992).

Fraley and Shepard (1989) found young-of-the-year bull trout were generally in
side channel areas and along the stream margins. McPhail and Murray (1979) found
young-of-the-year bull trout in areas of low velocity near stream edges.

Pratt (1984, 1985) studied microhabitat preferences of bull trout in the Flathead
drainage, Montana, and found that juvenile bull trout (<100 mm) usually remained near
the stream bottom, close to streambed materials and submerged debris. They tend to
seek out small pockets of slow water velocity (0.1 mps). Juveniles larger than 100 mm
also remained near cover, including larger instream debris. As the juvenile bull trout
grew, they became less associated with the streambed. The cover used by juveniles was
submerged, particularly unembedded substrate and woody debris. Juvenile bull trout
densities decline when the spaces between the substrate fill with fine materials (Enk
1985). Weaver and Fraley (1991) found a significant positive relationship between the
substrate score (Crouse et al 1981) and juvenile bull trout density. The substrate score is
an index of streambed particle size and embeddedness.

Food habits

During stream residence, juvenile bull trout are opportunistic feeders ingesting
aquatic invertebrates in similar percentages as they are available in the stream. Bull
trout larger than 110 mm in the Flathead system also eat small fish (Fraley and Shepard
1989). Fish identified in juvenile bull trout stomachs include sculpins (Cottus sp,),
salmon fry, and other bull trout (Pratt 1992). In Lake Pend Oreille, bull trout 100 - 300
mm ate insects and bull trout over 300 mm ate fish (Jeppson and Platts 1959).

Migration

Juveniles in most river systems have been reported to migrate at two to three
years of age, ahhough in the upper Flathead system 18% of the migrants were age I
(McPhail and Murray 1979, Fraley and Shepard 1989). The timing of emigration vanes
by age, size, and habitat availability (Willamette National Forest 1989). In the Flathead
River system, emigration of juveniles from the tributaries takes place largely from June to
August. The peak outmigration was in June in the Middle Fork tributaries, and July m
the North Fork tributaries (Fraley and Shepard 1989). Oliver (1979) reported that
juvenile bull trout migrated continuously throughout the summer and fall m the Wigwam
drainage. The young bull trout appear to move quickly along the margins of the larger
rivers (Willamette National Forest 1989, Fraley and Shepard 1989).

Sources of mortality

Outmigrating juveniles are sometimes harvested by anglers when they are large
enough (200 - 250 mm). Juveniles are also vulnerable to predation, particularly dunng
migration. In the upper Flathead River system of Montana, outmigrating juveniles may
be preyed upon by adult bull trout, lake trout, northern squawfish ( Ptychocheilus
oregonensis), and some northern pike (Esoxjudus) (Vashro pers. comm. 1992).

Adult behavior and habitat needs

Habitat preferences in rivers

The adult bull trout, like its young, is a bottom dweller, showing preference for
deep pools of cold water rivers, lakes, and reservoirs (Moyle 1976). In Oregon's upper
Klamath River, summer habitat for stream resident adults included water temperatures
from 9 to 15°C, gradients of 10 to 20%, moderate to fast currents, and stream widths of
two to five meters (Bond and Long 1979). Another resident population, found m Crater
Lake National Park, occupied a stream with summer temperatures of 5C, velocities of
0.6 to 1.8 meters per second, a stream width of three meters, and a gravel-rubble
substrate. It was fed by groundwater seeps (Wallis 1948).

Habitat preferences in lakes

Bull trout in Flathead Lake are distributed throughout all areas of the lake in all
seasons. They have been found at depths of 79 m., although it is almost certain that they
exist in the deepest areas of the lake (Hanzel 1985). In the summer in Flathead Lake
bull trout remain below the thermocline. In the spring when the lake is isothermal, bull
trout will use shallow waters (generally less than 30 m., more likely less than 16 m.) and
feed on yellow perch (Shepard pers. comm. 1992, Vashro pers. comm. 1992). However,
bull trout in Flathead Lake appear to move in response to temperature, and will eat
what prey is available (Hanzel 1985). In Priest Lake bull trout occupy the lower

thermocline in the summer, using depths from 12 to 18 meters and temperatures from
7.2 to 12.8°C. In the spring and fall, these fish moved to near surface waters when
temperatures were below 12.8°C (Bjomn 1961). Shepard (1985) listed the thermal
preference of bull trout (8 - 14°C) as a major influence on their vertical distribution in
Libby Reservoir, Montana.

Migration

Adfluvial adult bull trout generally mature for two to three years in lakes and
reservoirs before undertaking spawning migrations (Willamette National Forest 1989).
The general migratory pattern in the Flathead system is as follows: bull trout maturing in
Flathead Lake begin their spawning migration into the river system as early as April, with
the peak migration occurring during the high flows of May and June. They move slowly
upstream, arriving in the North and Middle Forks of the Flathead River during late June
and early July. Spawning migrations in the Flathead range from 88 - 250 km in length
(Fraley and Shepard 1989).

Adult bull trout remained at the mouths of the tributaries for two to four weeks
before entering the tributary streams at night from July through September. It appears
that bull trout in the Flathead form pairs while staging at the mouths of the tributaries.
Bull trout are generally not in final spawning condition when they enter the tributaries.
They hold in the tributaries for up to a month or more in deeper holes or in debris cover
before spawning (Fraley and Shepard 1989). Downstream movement after spawning is
very fast (Willamette National Forest 1989). Females generally leave the tributaries prior
to the males in the Flathead system (Fraley and Shepard 1989).

Several authors have recorded two spawning runs. The earlier run was made up
of the smallest and youngest individuals. These fish tended to remain in the tributaries
for longer periods than the older, second run adults (Oliver 1979, McPhail and Murray
1979).

Some incidental tagging information suggests that bull trout spawning migrations
may be more complex and variable than is indicated above. For example, a spawning
bull trout tagged in the North Fork of the Flathead moved downstream then upstream
into the Middle Fork, through a large lake, and was recaptured in a tributary of
McDonald Lake (Pratt 1992). Leathe and Enk (1985) tagged one spawning bull trout in
Goat Creek, a tributary of the Swan River, which moved downstream through Swan Lake
and over Bigfork Dam into Flathead Lake and then was recaptured 9 months later 55
km up the Flathead River. The total length of this movement was 119 km.

Another complex migration was noted in the Blackfoot River system. A 400 mm
bull trout was tagged in a spring creek system on August 8, 1990. This fish moved
downstream 0.8 km to the North Fork of the Blackfoot, then downstream 9.6 km to the

Blackfoot, then 31.2 km downstream to the Clearwater River. It was recaptured 9.6 km
up the Qearwater River on June 16, 1991, for a total migration of 51.3 km.

Age and growth

The annual growth increment for bull trout in Flathead I^ke ranged from 60 -
132 mm. Growth of fish residing in lakes was relatively constant after age IV. Growth
rates of bull trout in Flathead Lake were similar to those reponted for Priest and Upper
Priest Lakes, Idaho (Bjomn 1961), Hungry Horse Reservoir, and Lake Koocanusa
(Huston 1974, May et al 1979). The average length at age for bull trout in the Flathead
system ranged from 52 - 75 mm for age I, 98 - 129 mm for age II, 139 - 204 mm for age
III, 228 - 360 mm for age IV, 384 - 440 mm for age V, 472 - 538 mm for age VI, 566 -
574 mm for age VII, 655 - 658 mm for age VIII, and 731 mm for age IX, depending on
the water body (Fraley and Shepard 1989). Bull trout growth rate was slower in the
Middle Fork tributaries than in the North Fork tributaries, despite higher productivities
and warmer water temperatures (Shepard et al 1984).

Juvenile bull trout in the Swan River drainage grew relatively slowly in tributary
streams, but growth accelerated rapidly after these fish emigrated from tributary streams,
primarily as one and two year old fish. Fish longer than 700 mm total length are not
uncommon in Swan River spawning runs. The growth and condition of Swan Lake bull
trout was better than that reported for nearby Flathead Lake by Leathe and Graham
(1982). Growth of repeat spawners in Goat Creek, (tributary to the Swan River) was
nearly 50 mm during the period between spawning (Leathe and Enk 1985).

In general, the maximum period of growth appears to occur between the third and
fourth years of age. Most individuals by this time have reached a sufficient size to switch
to a piscivorous diet. Adfluvial populations average a 90 mm increase per year
(Willamette National Forest 1989).

The maximum size published for an adfluvial bull trout is 1025 mm and 14.5 kg,
for a fish taken from Pend Oreille Lake (Willamette National Forest 1989).

Food habits

The food habits of juvenile bull trout were discussed eariier. Adult bull trout are
generally opportunistic piscivores. In Flathead Lake, whitefish species and yellow perch
r Perca flavescensl were the most important food items, followed by kokanee
r Oncorhvnchus nerka') and non-game fish. Small bull trout also feed incidentally on
Mvsis (Fraley and Shepard 1989). Kokanee was the major food item for bull trout in
Pend Oreille Lake, Idaho (Jeppson and Platts 1959), while whitefish were the major food
in Upper Priest Lake, Idaho (Bjornn 1961).

In Hungry Horse Reservoir, approximately 32% of the stomachs examined were
empty. Over 99% of the biomass of the stomach contents was fish. Juveniles ate
primarily northern squawfish and mountain whitefish (Prosopium williamsoni) while
adults ate suckers, northern squawfish, and mountain whitefish. Cutthroat trout were
found in stomachs as well in varying amounts. Overall, the juveniles and the adults had
similar food habits, except the adults consistently ate more suckers than the juveniles
(May et al 1988).

Bull trout in Lake Koocanusa ingested at least 10 different species of fish. Over
99% of the biomass consumed by bull trout was fish. Collectively, salmonids were the
most important species consumed. Kokanee appeared to be the species of most
importance to bull trout, followed by Oncorhvnchus trout species, largescale suckers
r Catostomus macrocheilus l and peamouths rMylncheilus caumiusV The only species not
taken by bull trout were burbot (Lotajota) and bull trout (Chisholm et al 1989).

Cavender (1978) reported that sculpins predominated in the bull trout stomachs
he examined, but salmonids were found as well. Some bull trout had eaten gastropods,
and one 380 mm bull trout had swallowed a 215 mm individual of its own species. Two
bull trout from northern British Columbia had eaten small mammals. They are also
reported to feed on other vertebrates of suitable size such as frogs, snakes, mice, and
ducklings.

Several unique populations of bull trout with unusual food habits have been
reported There are three lakes in Glacier National Park which support non-piscivorous
populations of bull trout. In Upper Kintla Lake, bull trout are the only fish species. In
Upper and Lower Isabel Lakes, bull trout and cutthroat trout seem to have developed a
rather peculiar association, with the cutthroat trout being larger and more robust than
the bull trout. The bull trout are not piscivorous (Marnell 1985). Resident bull trout
populations in Bitterroot National Forest streams are also often smaller than the
cutthroat trout in the same streams (Clancy pers. comm. 1992)

Parasites

In Oregon, Shaw (1947, cited in Willamette National Forest 1989) reported bull
trout infected with the cestode Ahnthrium crassum . the nematode Dachnitis truttae , and
the trematodes Crepidostum cooperi and Aponunus sp. Wallis (1948) found
roundworms, nematodes, and tapeworms in fish from a stream resident population.
Patches of Saproleenia covered some individuals. Hanzel (1985) listed the tapeworm
Dibothriocephalus latum and the external copepod Salmicola edwardsonii from Flathead
Lake. Hanzel (1985) cited Elrod (1926) as stating that out of 121 bull trout stomachs
examined from Flathead Lake, all but three had tapeworms in the stomach and
intestines. The cestode Fubothrium salvelini, the acanthocephalan Neoechinorhynchus
rutili. and the trematode Crepidostomum farionis were found in bull trout from British
Columbia (Bangham and Adams 1954). At the Kootenai Hatchery in British Columbia,

Brown (1985) noted eggs and fry were infected with mxyobacteria, flexibacteria (similar
to cold water disease), and gill disease. The bacterial gill disease Costia was reported at
the Wallowa Hatchery in Oregon (Oregon State Game Commission 1968).

Sensitivity to environ ineiital dis turbance

Genetic JEactors

Relatively few studies have been done to date on the genetics of bull trout. In
fact, it has only been since 1980 that bull trout have been officially recognized as a
separate species, distinct from its relative the Dolly Varden (Salvelinus malma)
(Cavender 1978, Robins et al 1980).

Leary (1985) reported electrophoretic data indicate the bull trout, arctic char
r Salvelinus alpinus \ brook trout ( S. fontinalisi and lake trout (S. namaycush) are all
genetically very distinct. The bull trout and arctic char are the Iwo most similar taxa.

In order to develop a sound conservation plan for bull trout, the population
genetic structure of the population needs to be understood. Leary et al (1991) found
that the population genetic structure of bull trout in the Columbia and Klamath River
drainages is typical of salmonid fishes inhabiting interior waters. There is relatively little
genetic variation within populations, but substantial genetic differences among
populations. Preservation of the genetic variation of the bull trout will require continued
existence of many populations throughout the area.

Leary et al (1991) found that bull trout from the Klamath and Columbia drainages
are reproductively isolated and are evolutionarily distinct. These two groups of bull trout
would qualify as separate "species" under the United States Endangered Species Act
according to criteria established for anadromous salmonid fishes.

One of the difficult problems biologists are facing with regard to the conservation
of bull trout is the widespread distribution of the non-native brook trout throughout the
bull trout range. Hybridization between brook trout and bull trout has been reported m
Montana (Leary et al 1983), Alberta (Scott and Grossman 1973), and Oregon (Markle
1992). The hybrids are almost completely sterile (Leary et al 1991).

The frequent production of sterile interspecific hybrids is an unstable situation that
should lead to the loss of one of the two parental types. Life history differences between
bull and brook trout tend to favor the brook trout in this situation (Leary et al 1991).
Brook trout become sexually mature at age two or 3, are relatively short-lived, and tend
to "overpopulate" small streams. In contrast, bull trout do not reach sexual matunty until
3-6 years, and are long lived (Scott and Grossman 1973).

Leary et al (1991) present data from Montana which tends to confirm this
hypothesis. Bull trout have been largely replaced by brook trout in a stream where
hybridization was first detected in the early 1980's. They expect this trend to continue
until bull trout are extirpated from the stream or brook trout meet an upstream dispersal
barrier.

On the Bitterroot Forest, bull trout are not usually found together with brook
trout in large numbers, it is either one or the other in large dominance with a few of the
minority species present (Clancy pers. comm. 1992).

Given the wide distribution of brook trout throughout the range of bull trout and
the increasing frequency with which hybrids are being reported, this is a dangerous
situation for bull trout. Bull trout populations which are exposed to brook trout are at
an increased risk of extinction.

Several interesting questions about bull trout genetics remain. Is there a genetic
difference between populations that spawn in differem streams, but utilize the same
habitat as adults? For example, are the bull trout that reside in Flathead Lake members
of one population, or two (Middle Fork and North Fork) or 26 (the number of spawning
tributaries)? Leary (pers. comm. 1992) feels that if bull trout are similar to other interior
salmonids then each spawning tributary is probably a separate population. If so, this
could complicate the management of the Flathead Lake fishery.

Another unanswered question is: are there genetic differences between the
adfluvial, fluvial, and resident forms? Or is the life history mode determined by a
combination of the growth rate of the individual fish and environmemal factors? We
have a large number of small resident bull trout populations in Montana which are
isolated from the larger rivers and lakes. Frequently, the isolation is the result of
environmental disturbance and habitat degradation. If these habitats could be restored,
and the connections made between the isolated, resident populations and the bigger
bodies of water, could we restore some migratory bull trout runs? Clearly there are
some important questions remaining concerning bull trout population genetics.

Environmental and life history characteristics

Bull trout share several features of their life history with other far- northern
species such as lake trout, Arctic char (Salvelinus alpinus), grayling ( Thymallus arcticus )
whitefish ( Prosopium sp.\ and ciscoes (Coregonus sp.). These features include advanced
age at maturity, alternate year spawning, extensive migrations, and separation of juvenile
and adult segments of the populations. These general characteristics are adaptive in
relatively unstable periglacial and northern environments, but some of them, particularly
advanced age at maturity, render fish populations sensitive to the effects of human
exploitation (McCart 1985).

Bull trout seem to be particularly vulnerable to overharvest. Because the
spawners are relatively large and their spawning tributaries are relatively small, buU trout
are easily observed and targeted. In addition, bull trout are weU known for their
voracious appetites, making them easily taken by anglers. Finally, they have a tendency
to congregate at the mouths of key tributaries or in favored spawnmg areas, further
increasing their vulnerability to angling. In many areas, the bull trout's slow rate of
maturation subjects them to substantial angling mortality before they have a chance to
spawn. In a fluvial population of the Muskeg River, Alberta, Boag (1987) found that the
majority of bull trout harvested by anglers were immature individuals less than five years
old In the Flathead River system, Montana, anglers harvest some of the largest
outmigrating juveniles as they exceed 200 - 250 mm (Vashro pen. comm. 1992).

Stories of anglers taking loads of bull trout with their bare hands or with pitch
forks abound. Frequently these stories concern locales where bull trout are no longer
found This may not be a coincidence. Proposals are being considered to lower or
eliminate harvest of bull trout in many parts of Montana. Unfortunately, lower bag limits
or closed seasons alone do not effectively protect bull trout when poaching is a problem.
On the Wenatchee National Forest illegal harvest and outright vandalism (wanton killmg
and wastage of adult bull trout) has been observed Avith disconcerting regularity (Brown
1992).

The long overwinter incubation and development phase for bull trout embryos and
alevins leaves them particularly vulnerable to fine sediments and degradation of water
quality (Fraley and Shepard 1989). Embryos and alevins need both security and cold,
oxygenated water. Any physical or water quality changes that alter the delicate balance
among water quality, flow, and stream bottom composition can have disastrous effects on
these early life stages. Data from the Flathead and Bitterroot National Forests are
indicating a clear connection between logging activity, sediment levels, and bull trout
production (Weaver pers. comm. 1992, Clancy pers. comm. 1992).

Increased sediment loads in tributary streams can also impact juvenile bull trout
because of their close association with the substrate and their use of the interstitial
spaces for cover. In addition, juvenile bull trout feed on aquatic insects which are also
sensitive to changes in streambed composition. Declining reanng habitat due to
sediments and/or reduced stream flows could force juveniles to migrate at a youngw age
and smaller size, thus increasing susceptibility to predation (Vashro pers. comm. 1992).

Adult bull trout will only spawn in streams meeting narrow physical and
temperature criteria during their limited spawning season. Changes in environmental
conditions at spawning areas could lead to unsuccessful spawning or could cause a failure
of the stimulus that triggers final spawning behavior. Adults are also sensitive to
environmental changes in the river system which they inhabit for five to six months
during spawning runs.

Bull trout are especially sensitive to modifications of water temperature. They
seem to require warmer temperatures in the winter and colder temperatures in the
summer. Any human activity, including local impacts such as reduced npanan
vegetation, or large scale impacts such as global warming, which change water
temperatures could impact bull trout production.

Finally, fluvial and adfluvial bull trout are a highly migratory fish. Construction of
passage barriers can block migration and isolate populations, resulting in loss of spawnmg
habitat and genetic isolation. In addition, bull trout can be lost to unscreened imgation
diversions or killed by hydroelectric turbines.

Bull trout are thus a species with narrow environmental tolerances, and are highly
sensitive to disturbance. Bull trout are dependent on the quality of the habitat and on
population management in rivers, lakes, and tributaries.

Introductions of non-native species

In addition to the problems bull trout face from brook trout (see section on
genetics), bull trout are also faced with competition from a wide range of other non-
native species. Nelson (1965) referred to introductions of brown trout Salmo trutta and
possibly non-native suckers Catostomus sp. as factors in the decline of bull trout m the
Bow River. The introduction of brown and brook trout may have been a factor
contributing to the decline of bull trout in the McQoud River (Moyle 1976, Rode 1990).

Marnell (1985) mentioned the introduction of lake trout as a possible factor
contributing to the decline of bull trout in some areas of Glacier National Park. The
Montana Department of Fish, Wildlife, and Parks (1992) also suspects that lake trout
predation on bull trout may impact bull trout populations in the upper Flathead River
system. In the late 1980's, juvenile lake trout began to appear in the Flathead River.
Their presence has been documented as far upstream as West Glacier on the Middle
Fork of the Flathead and the Canadian border on the North Fork of the Flathead. A
1991 survey of 23 lake trout stomachs from the Flathead River produced eight westslope
cutthroat trout and one juvenile bull trout. The overall impact of lake trout predation of
bull trout abundance is not known, but lake trout limits were liberalized m 1991 m an
attempt to reduce predation, among other things (Vashro pers. comm. 1992).

Intentional and unintentional eradication

In the early 1900's, attempts were made to eradicate bull trout due to their
voracious habits. A commercial fishery using nets was permitted in Montana m 1913 -
1914 (Brown 1971). Other states had bounties on bull trout, and Montana may have had
a bounty as well (Simpson and Wallace 1978, Vashro pers. comm. 1992).

Ratliff and Howell (1992) list chemical rehabilitation projects as one of the causes
of decline for bull trout in Oregon. In the 1950's and 1960's a number of waters, some
of which contained bull trout, were treated with rotenone to remove rough fish. There
was little concern at the time about bull trout.

Similar projects may have been done in bull trout waters in Montana. For
example, in the 1960's there was a basin-wide lake rehabilitation effort in the Clearwater
chain of lakes, Blackfoot River drainage. Tributaries and lakes were thoroughly poisoned
with rotenone to remove competitive threats from non-native species. However, bull
trout appear to have survived in all the Qearwater lakes and populations appear to have
improved in the last decade based upon limited gill net and angler reports (Peters pers.
comm. 1992).

Status of bull trout in Montana - overview of the state
Historic distribution

Bull trout are distributed in a north-south belt along the Rocky Mountain and
Cascade ranges of northwestern North America. The area stretches from latitude 41°N,
to latitude 60°N or slightly beyond. Bull trout are distributed on both sides of the
continental divide between latitude 50 and 60°N, but primarily west of the continental
divide south of this zone. The bull trout likely originated in the Columbia River basm
(Cavender 1978).

The bull trout is one of the four species of salmonid native to western Montana
(westslope cutthroat trout, mountain whitefish, and redband rainbow trout being the
other two). There is limited information available on the historic distribution of this fish.
However, for this report it is assumed that they were generally distributed throughout
western Montana. Possible exceptions are areas where migration was blocked by natural
barriers or areas where the geology of the area may have created adverse conditions for
bull trout. This is a reasonable assumption given the current distribution of bull trout m
Montana. Almost every drainage has examples of bull trout populations in small
headwater tributaries. In order for bull trout to have dispersed so widely, they must also
have existed in all the major drainages.

In addition to their distribution west of the continental divide, bull trout are native
to the St. Mary's River drainage (Saskatchewan River drainage), east of the continental
divide (Brown 1971, Marnell 1985).

Current distribution
Methods

Personal interviews were conducted of state, tribal, and federal fisheries biologists
working in bull trout waters around the state. Based on information gathered in these
interviews, the Montana Interagency Fisheries Database was updated and corrected to
reflect the current status of bull trout in Montana waters. In addition, information was
recorded on a data form devised by Region 1 of the Forest Service for a regional bull
trout status review. Published and unpublished reports were also reviewed for
information.

Information collected for the Interagency Database for each water body included:
a fish abundance rating, fish use rating, (including use for spawning only, rearing only,
resident, or a combination of uses), a genetics ranking of the population, and a habitat
value rating. Additional information collected for the regional bull trout status review
included: the life history mode, whether or not the population is considered to be a
remnant, the population status, the positive and negative factors influencing the
population status, the type of information that is available about the population, and the
contact persons. An attempt was made to document every stream where bull trout have
been caught in the last 10 years, although some of the data was older and, therefore, a
less reliable indicator of current status.

The Environmental Protection Agency (EPA) River Reach Numbering System was
used to identify stream reaches for analysis of bull trout status within each hydrologic unit
(Figure 1). In this system, streams are divided into distinct reaches at tributary junctions
or confluences. A "river reach number" (RRN) is assigned to each reach. Each RRN is
16 digits:

1) the first eight digits represent the USGS Cataloging Unit (CU) that identifies
the hydrologic basin within which the stream reach is located;

2) the next three digits represent a unique segment number that, in combination
with the CU, identifies the reach within a basin;

3) the last four digits represent the mile point number that identifies a section or
sub-reach within a stream.

Recently, the Bonneville Power Administration and the Northwest Power Planning
Council, in cooperation with EPA, embarked on a project to revise the digital reach data
and EPA Reach File to reflect hydrography on a 1:100,000 scale from the existing
1:250,000 scale. When this project by the Montana Rivers Information System is
complete it will be possible to make a more complete and accurate analysis of status of
bull trout in Montana.

Figure 1

fOUnCAL lUKMVtsaOM COM

Abundance codes were assigned to every reach with bull trout (Table 1). The
selection of the appropriate code was left to the field biologists who were interviewed for
this report. These codes are somewhat subjective in nature. It is important to note that
populations which were given the abundance code "rare" included streams with as few as
one documented buU trout. In addition, some of this information is dated and may not
reflect currem conditions. The abundance code E (expected but not verified) was used
in situations where no data exists, but the local biologists believed that bull trout would
be found. The abundance code Z (abundance unknown) was used m situations where
there was documentation of bull trout in the reach, but no data on their abundance. A
few reaches were coded P (species absent but could be present if introduced) when the
biologist felt that was appropriate.

Each bull trout water was also given a use code (Table 2). Again, this coding is
based on the professional judgement of the field biologists. In most cases, the biologists
had a difficult time distinguishing between adfluvial, fluvial, and resident populations. It
a migration barrier exists, then the population above the barrier is known to be resident.
In other situations, the distinctions are much less clear. Streams containing only sinall
fish may have juvenile fluvial and adfluvial fish or resident fish or a combmation it a
stream does have large fish, they could be large residem fish or migratory fish Due to
the difficulties in assigning the proper use code, these data should be used with a great
deal of caution.

For the genetic coding (Table 3), brook trout were considered to be a
contaminating species. Streams without electrophoretic data were usually coded either B
or E Code B indicates a potentially pure population with no record of contaminating
species, code E indicates a potentially pure population where brook trout are known to
exist. Since brook trout X bull trout hybrids are apparent from visual inspection, some
populations may have been classified as hybridized even though no electrophoresis has
been conducted.

The habitat coding (Table 4) is based on the judgement of the biologist. In the
Montana Interagency Stream Database System, streams are designated as habitat code N
(not applicable) when the genetic code is E (contaminating species known to exist).
However, in order to get a better sense of the status of these populations, habitat ratings
for as many of these streams as possible were obtained, even when the genetic code was
E.

Finally, a rating for the risk of extinction for each stream reach with bull trout was
developed (Table 5 and Table 6). This extinction rating was based on a similar ratmg
done by Ratliff and Howell (1992) in their status review of bull trout in Oregon. The
rating is based on three criteria: the abundance of the fish, the rating of the habitat, and
the risk of hybridization with brook trout. The rating ranges from 3, meaning Imle risk
of extinction, to a risk of 12, meaning a high risk population. This rating is not meant to
be an exact numeric designation but rather a technique for measuring relative risk.

Table 1. Relative abundance of bull trout, by hydrologic unit. Numbers refer to the
number of reaches. (See below for definition of codes)

Hydrounit

AifeB

1 17010101
Kootenai R

17010102
Fisher R.

17010103
Yaak R.

17010104
lower
Kootenai R.

17010201
upper Clark
Fork

17010202
Flint Ck,
Rock Ck

17010203
Blackfoot

17010204
middle
Clark Fork

17010205
Bitterroot

17010206

NFk

Flathead

17010207

MidFk

Rathead

17010208
Flathead R

17010209
S. Fk.
Flathead

1 17010210
1 Stillwater

17010211
Swan R.

17010212

lower

Flathead

17010213
lower Clark
Fork

10010002
St. Mary's

TOTAL

148

225

388

293

Definition of species abundance codes

A = Abundant

B = Abundant with proportion of large sized fish

C = Common

D = Common with proportional number of large sized fish

U = Uncommon

V = Uncommon with proportional number of large sized fish

R = Rare

E = Species expected but not verified

N = Not present (mostly used in situations where the data previously entered into the

database indicated bull trout were present, but current information suggests they are not

present. See text for more explanation.)

P = Species absent but could be present if introduced

Z = Abundance unknown

Table 2. # STREAM REACHES WITH USE CODES:
(See below for explanation of codes)

HYDROUNIT

17010101
Kootenai R

17010102
Fisher R.

17010103
Yaak R.

17010104
lower
Kootenai R

17010201
upper Clark
Fork

17010202
Flint Ck, Rock
Ck

17010203
Blackfoot

17010204
middle Clark
Fork

17010205
Bitterroot

102

17010206
N. Fk.
Flathead

17010207
Mid. Fk.
Flathead

17010208
Rathead

17010209
S. Fk.
Flathead

2 1

17010210
Stillwater

17010211
Swan R.

17010212
lower Flathead

17010213
lower Clark
Fork

10010002
St. Mary's

TOTAL

223

307

258

218

Definition of use codes

L = Resident throughout life cycle

A = Spawning elsewhere - spends part or most of life in reach

J = Spawning and nursery to subadult (includes both fluvial and adfluvial)

C = Passing through - species uses reach as a corridor to migrate

F = Feeding run or avoiding poor conditions elsewhere

N = No use (Used with abundance code N = not present)

Z = Use undetermined

R = Both resident and migratory fish utilize the reach

Table 3. # REACHES WITH GENETIC CODES:
(See below for explanation of codes)

HYDROUNIT

I "1

1 17010101
Kootenai R.

4 1

17010102
Fisher R.

17010103
Yaak R.

17010104

lower Kootenai R

17010201

upper Clark Fork

1 17010202
Flint Ck, Rock Ck

17010203
Blackfoot R.

17010204

middle Clark Fork

17010205
Bitterroot R.

123

17010206

N. Fk. Flathead

17010207

Mid. Fk Flathead

100

17010208
Flathead R.

17010209

S. Fk. Flathead

17010210

Stillwater R.

1 17010211
1 Swan R.

8 1

1 17010212

1 lower Rathead

17010213

lower Clark Fork

10010002
St Mary's R.

TOTAL

425

167

644

Definition of genetic codes

A = A genetically pure population as determined by electrophoresis that is isolated from
contaminating species.

B = A potentially pure population where there is no record of contaminating species in
areas where spawning occurs. Contaminating species for bull trout is brook trout.

C = A potentially pure population where no contaminating species exist, but planting
records indicate that a contaminating species has been planted in the drainage or is
elsewhere in the drainage and could invade.

D = An especially valuable genetically pure bull trout population (determined by
electrophoresis) where there are also contaminating species in the reach or drainage.

E = A potentially pure population where contaminating species are known to exist.
G = A genetically pure population could exist but is not present.

H = A hybridized or introgressed population known to exist based on electrophoresis.
For this report, this category was expanded to include populations visually identified as
brook trout X bull trout hybrids.

I = A genetically pure population where contaminating species could invade. Sometimes
used instead of genetics rating D for bull trout in order to upgrade an especially
important spawning stream.

Table 4. # REACHES WITH HABITAT CODES:
(See below for definition of habitat codes)

HYDROUNIT

17010101
Kootenai R.

17010102
Fisher R.

5 1

1 17010103
Yaak R.

21 1

17010104

lower Kootenai R.

17010201

upper Clark Fork

45 II

17010202

Flint Ck, Rock Ck

22 1

17010203
Blackfoot R.

17010204

middle Clark Fork

17010205
Bitterroot R.

40 1

17010206

N. Fk. Flathead R.

17010207

Mid. Fk. Flathead

17010208
Flathead R.

17010209

S. Fk. Flathead R.

17010210
Stillwater R.

32 1

17010211
Swan R.

17010212

lower Rathead R.

17010213

lower Clark Fork

10010002
St. Mary's R.

TOTAL

305

304

159

A = Best habitat

B = Substantial value habitat

C = Moderate value habitat

D = Limited value habitat

N = Not applicable, sometimes used when genetic

= E

143

412

Table 5. CRITERIA FOR THE RISK OF EXTINCTION

Category

Low risk of
extinction = risk
factor 1

Of special
concern = risk
factor 2

Moderate risk of
extinction = risk
factor 3

High risk of
extinction = risk
factor 4

Abundance
code

Code A or B
abundant

Code C or D
common

Code U or V
= uncommon

Code R = rare

Habitat value
code

Code A = best
value habitat

Code B =
Substantial
value habitat

Code C =
Moderate
value habitat

Code D =
Limited value
habitat

Brook trout
(Genetic code)

Code A = pure
bull trout with
no brook trout
in area

Codes B, C, J =
low risk from
brook trout

Codes D, I =
brook trout
could invade

Codes E, H =
hybrids exist or
brook trout in
reach

The total risk of extinction is the sum of the three risk factors. Range is from 3 (low
risk) - 12 (high risk).

Table 6. RISK OF EXTINCTION, BY HYDROLOGIC UNIT
3 = Minimal risk, 12 = Maximum risk. See text.

HYDROUN
IT

12 1

1 17010101
Kootenai R.

17010102
1 Fisher R.

•

17010103
Yaak R

17010104
lower
Kootenai R.

■

17010201
upper Clark
Fork

17010202
Flint Ck,
Rock Ck

17010203
Blackfoot R

17010204
middle Clark
Fork

17010205
Bitterroot

17010206
N. Fk.
Flathead

17010207
Mid. Fk.
Flathead R.

17010208
Flathead R.

17010209
S. Fk.
1 Flathead

17010210
II Stillwater R

17010211
Swan R.

II 17010212
lower
Flathead R.

17010213
lower Clark
FkR.

10010002
St. Mary's

TOTAL

162

143

161

110

86 1

Appendix A contains a printout of all the stream reaches in the Montana
Interagency Database which contain bull trout. Appendix B contains the Montana
information gathered for the regional bull trout status review. These datasheets contain
some additional information not given in the database.

Distribution of bull trout in Montana

Based on the updated information in the Interagency Database, bull trout are
found in 42% of the river and lake reaches in their native range in Montana (Table 7).
If it is assumed that bull trout were distributed throughout western Montana historically,
then this represents a loss of bull trout from 58% of their native range. This estimate
may be either too high or too low, depending on the following variables: First, there are
areas of western Montana that may never have been utilized by bull trout, in which case
the loss has been over-estimated. On the other hand, the database is currently
incomplete, especially with regard to lakes. Since most of the missing streams and lakes
probably do not contain bull trout, the loss estimate may be conservative. Finally, the
estimate includes populations that are designated as rare - some of which may actually be
extinct. If this is the case, the estimate of loss is too low. When the ongoing update of
the Interagency database is completed the length of the stream reaches will be more
accurate in the database. At that time it will be possible to undertake a more complete
and accurate analysis of miles of habitat lost.

Of the 1,250 reaches which have information about bull trout use, 223 contain
resident bull trout, 307 contain bull trout that spawn elsewhere, 258 serve as spawning
and nursery areas, and 218 have both resident fish and juvenile migratory fish. In
addition, 96 reaches have bull trout passing through, 13 reaches contain either a feeding
run or serve as a refuge from poor conditions elsewhere. There are 58 reaches where
bull trout are known to exist, but their use of the area is undetermined and 67 reaches
with no bull trout use.

Slightly over half the reaches containing bull trout have a genetic code E, meaning
a potentially pure population where contaminating species are known to exist (Table 3).
In addition, another 29 records are coded H, meaning a hybridized or introgressed
population is known to exist based on electrophoresis. In total, 51% of the state's bull
trout populations are at high risk for genetic contamination from brook trout.

Of the 911 reaches where data on habitat quality are available, 609 have a habitat
quality rating of A or B - best or substantial value habitat (Table 4). There are 143
reaches that provide only limited value habitat. While the picture could change if data
on the rest of the reaches was available (those reaches with habitat value code N), it
appears that a substantial portion of the remaining bull trout habitat in Montana is in
good condition. Of course, this analysis does not take into consideration the condition of
the habitat that historically contained bull trout, but no longer supports these fish.

Table 7. Number of reaches and number of miles of stream containing bull trout in
Montana

[HYDROUNrr

# REACHES
TOTAL

# REACHES
WITH BULL
TROUT (%)

#MnKS
TOTAL

# MILES
WITH BULL 1
TROUT (%) j

17010101
Kootenai R.

353

122 (35%)

1,198.9

456.6 (38%)

1 17010102
Fisher R.

5 (6%)

301.3

29.4 (10%)

17010103
Yaak R.

24 (33%)

259.6

59.7 (23%)

17010104
lower
Kootenai R.

3 (50%)

3L1

6.3 (20%)

17010201
upper Clark
Fork R.

132

49 (37%)

812.5

234.3 (29%)

17010202 Hint
Ck, Rock Ck

118

65 (55%)

516.0

243.9 (47%)

17010203
Blackfoot R

227

98 (43%)

1,001.7

460.2 (46%)

17010204
middle Clark
Fork R.

264

131 (49%)

974.7

424.5 (43%)

17010205
Bitterroot R.

303

156 (51%)

1,401.8

881.2 (63%)

17010206 N.
Fk Flathead

155

87 (56%)

588.0

284.7 (48.4%)

17010207 Mid
Fk Flathead
R.

170

119 (70%)

594.6

425.6 (72%)

17010208
Flathead R.

13 (17%)

425.8

174.4 (40.9%)

17010209 S Fk
Flathead

286

94 (33%)

888.7

386.3 (43%)

17010210
Stillwater R

164

60 (37%)

514.4

217.2 (42%)

17010211
Swan R.

185

82 (44%)

557.9

300.5 (54%) II

17010212
lower Flathead
R.

19 (22%)

565.2

114.8 (20%)

17010213
lower Clark
Fork R.

232

86 (37%)

874.1

307.4 (35%) II

10010002
St. Mary's

22 (44%)

241.7

120.8 (50%)

TOTAL

2957

1235 (42%)

11,759

4927.8 (42%) |

• Includes reaches designated as abundance code E = bull trout expected but not
verified, and also reaches designated as abundance code Z = abundance unknown

Because of the large number of records that did not have habitat value ratings, it
was possible to calculate the risk of extinction on only 831 reaches. These ratings were
skewed in the direction of moderate to high risk of extinction. Only 32 reaches had a
low risk of extinction (rating 3, 4, or 5). In contrast, 86 reaches had the highest possible
risk of extinction (12) (Table 6).

Status of bull trout in Montana - hy hydrolopic unit

Hydrologic unit # 17010101 - The Kootenai River (not including the Yaak
drainage or the Fisher River)

Historic distribution

Historically, bull trout were distributed throughout the drainage. However, there
must have been two separate populations above and below Kootenai Falls. This falls is a
natural barrier which prevents upstream fish migration. Bull trout are currently found
upstream of this falls, so it is assumed that they existed upstream of the falls histoncally
as well.

Current distribution

The construction of Libby Dam created another migration block on the Kootenai
River. In addition, a portion of the river has now been converted to a reservoir. As a
result, there are now three separate main stem Kootenai River bull trout stocks - those
below Kootenai Falls, those above the falls and below the dam, and those above the
dam. The fish above the dam were fluvial fish that have now been forced into an
adfluvial life history mode.

The bull trout in the Kootenai River below Kootenai Falls may include some
adfluvial fish from Kootenay Lake. There is some minor tributary use (Callahan Creek,
and the lower Yaak River). Fish are found in Lake Creek and O'Brien Creek each year,
but may not be able to spawn. Two large bull trout (762 mm and 610 mm) were caught
in O'Brien Creek in July 1992 (Vashro pers. comm. 1992). Brook trout are present m
the tributaries but no genetics work has been done to date (Perkinson pers. comm. 1992).

The most important spawning stream for bull trout living in the Kootenai River
between Kootenai Falls and Libby Dam is Quartz Creek. Trapping work done m this
stream estimated that there was a population of approximately 250 fish using this
spawning tributary, although only 25 - 35 spawning fish were trapped each year (Marotz
pers comm. 1992). The 1991 redd survey for Quartz Creek found 32 positive, 9 possible,
and 10 false redds. The West Fork of Quartz Creek is also used by spawmng bull trout.
The 1991 redd count found 43 positive, 6 possible, and 2 false redds (Skaar 1992). The
genetic status of this population has been tested, and a hybridization rate of 25% has
been detected (Perkinson pers. comm. 1992).

Pipe Creek has a moderate amount of bull trout spawning activity. In 1991 five
positive redds were found in a concentrated area of this stream. The 1991 survey m this
drainage did not find any other streams which had bull trout redds, although some other
potentially suitable areas were noted (Skaar 1992). This stock of bull trout has been cut
off fi-om many potential spawning tributaries upstream by Ubby Dam.

The bull trout population in Lake Koocanusa is small in number (< 5% of the
fish population), although individuals are large in size. Bull trout in Lake Koocanusa
show greater growth than bull trout in Hungry Horse Reservoir or Flathead Lake up to
age four. After that, growth is comparable to these other waters. The data suggest that
there is some feeding advantage for bull trout in Lake Koocanusa relative to these other
waters (Chisholm et al 1989).

Bull trout are a very minor portion of the angler harvest (0.06%) in Lake
Koocanusa, based on data collected in the summer of 1985. The average buU trout
creeled fi-om this reservoir was 411 mm in length and the average catch rate was < 0.01
fish/hr (Chisholm and Hamlin 1987).

The Lake Koocanusa bull trout utilize Graves, Stahl, Clarence, and Blue Sky cks.
for spawning. Unfortunately, they have to migrate through the Tobacco River to access
these streams, making the trip difficult. In addition, some Lake Koocanusa fish move
north into tributaries in Canada and the Wigwam River for spawning. Some mmor
tributary use is probable in Pinkham Creek and Big Creek (Shepard, pers. comm. 1992,
Marotz pers, comm. 1992, Perkinson pers. comm. 1992).

Bull Lake also supports a remnant population of adfluvial bull trout. These fish
are atypical in that they migrate downstream to spawning tributaries. The primary
spawning tributaries are Stanley and Keeler creeks.

Bull trout in this drainage are dependent on a few key tributaries to support the
population. This fact alone puts the population at risk. In addition, a review of the nsk
of extinction for these populations based on fish abundance, habitat value, and presence
of brook trout indicates that the majority of the populations are at moderate to high nsk
(Table 6) Of the 96 reaches where a risk of extinction could be calculated, 74 (77%)
had a risk of extinction between 8 - 10 on a scale of 3 - 12, 12 being the highest risk.
There are 20 reaches (19%) with a risk of extinction of 11 - 12 (high risk).

The West Fork of Quartz Creek appears to have the most secure population in
the drainage, with a risk of extinction rated at 6. As mentioned above, this is one of the
most important spawning tributaries in the drainage. Waters with the greatest nsk of
extinction are Camp Creek, Keeler Creek, Meadow Creek, Murphy Creek, and Pipe
Creek.

Hydrologic unit # 17010102 - the Fisher River
Historic distribution

Bull trout were likely distributed throughout the Fisher River drainage historically
as there are no physical barriers to migration (Perkinson pers. comm. 1992).

Current distribution

Biologist Doug Perkinson (pers. comm. 1992) has characterized the bull trout
population in this drainage as non-viable if not extinct. There are five stream reaches
where bull trout populations are expected but not verified (Table 1, Appendix A). There
are 20 reaches where fluvial bull trout could be present if introduced. Brook trout are
abundant in the drainage, a factor which could complicate re-introduction efforts. Most
of the potential bull trout waters are rated as having moderate value habitat (Table 4).

Hydrologic unit # 17010103 - the Yaak River

Historic distribution

It is possible that Yaak Falls was a migration barrier that prevented bull trout
from colonizing the Yaak drainage above this point.

Current distribution

Currently, bull trout are only known to be found below Yaak Falls. The Yaak
River above Yaak Falls is coded as bull trout expected but not verified. In the Yaak
River below Yaak Falls fluvial bull trout are rare. These fish have a relatively high risk
of extinction (Table 6) because of their rarity and the presence of brook trout. The
habitat value of the lower Yaak River is considered to be substantial.

Hydrologic unit # 17010104 - Kootenai River from Idaho to the Yaak River

Historic distribution

This small hydrologic unit encompasses the Kootenai River drainage from the
Idaho border to the Yaak River. Bull trout are assumed to have been distributed
throughout the drainage.

Current distribution

There is a population of fluvial and/or adfluvial bull trout in the mainstem
Kootenai below the Yaak River. These fish are uncommon, with a proportional number
of large size fish. They are assumed to be spawning elsewhere (not in the mainstem

Kootenai R.) (Table 2). They are considered to be the same population as is found in
the Kootenai above the Yaak River and below Kootenai Falls (see discussion under
hydrologic unit # 17010101).

Hydrologic unit # 17010201 - the Qark Fork River from Warm Springs Creek to
the Blackfoot River, not including Rock Creek and Flint Creek.

Historic distribution

Given the current distribution of bull trout in this drainage, it is apparent that bull
trout at one time inhabited all the major streams in this drainage.

Current distribution

Bull trout are rare in the mainstem Clark Fork River between the Blackfoot River
and Warm Springs Creek. The only portions of the Uttle Blackfoot River which still
contain bull trout are the upper sections above Dog Creek. Below this point, bull trout
appear to have been eliminated.

Only a few tributary streams are known to contain bull trout. Harvey Creek has a
population of resident bull trout, but a barrier at the mouth of the stream prevents Clark
Fork River fish from utilizing this stream for spawning. The upper portion of Harvey
Creek, above Eightmile Creek, appears to have the most secure population of bull trout
in the drainage (risk of extinction = 6). Some sections of Warm Springs Creek contain
bull trout, but they are primarily resident populations residing in the headwaters sections.
Rock Creek and Schwartz Creek contain bull trout. Barker Creek and Storm Lake
Creek may also contain bull trout, but their abundance is unknown.

A few lakes in this drainage contain their own adfluvial populations of bull trout,
specifically, Lower Twin Lake, Upper Twin Lake, and Silver Lake.

Given the extensive mining impacts that have occurred in this drainage it is not
surprising that bull trout are rare and primarily restricted to headwaters portions of
relatively pristine tributaries.

Hydrologic unit # 17010202 - Rock Creek and Flint Creek drainages

Historic distribution

The current distribution of bull trout in this drainage implies that bull trout were
distributed throughout the drainage historically.

Current distribution

The Rock Creek drainage may be the best bull trout drainage in the state outside
of the upper Flathead River system. In general, this drainage has had relatively few
human impacts, although there is some mining, logging, agriculture, and residential
development. In the mainstem of Rock Creek, bull trout are uncommon below Welcome
Creek and common above Welcome Creek. The habitat in all of Rock Creek is rated an
A - best value habitat. However, brook trout are present in Rock Creek and a number
of the important spawning tributaries. Electrofishing surveys done in 1984 noted some
apparent bull trout X brook trout hybrids in several of the tributary streams, but no
electrophoresis has been done to confirm this information. A few tributaries remain
brook trout free - Alder Creek, Cinnamon Bear Creek, South Fork of Ross Fork, West
Fork Rock Creek, Wyman Creek, and Welcome Creek.

It is unknown to what degree Clark Fork River bull trout utilize the Rock Creek
drainage as a spawning area. Given the excellent habitat found in this drainage, it is
prudent to assume that the few remaining bull trout in the mainstem Clark Fork rely
heavily on this stream for spawning.

The Flint Creek drainage has had considerably more human impacts than Rock
Creek and bull trout are generally in perilous condition. Bull trout are uncommon in
Flint Creek and Boulder Creek. They are rare in most of Copper Creek, Douglas Creek,
and Wyman Gulch Creek.

A few headwaters lakes contain adfluvial populations of bull trout. They are rare
in East Fork Reservoir, Kaiser L, and Moose L.

Hydrologic unit # 17010203 - the Blackfoot River drainage

Historic distribution

Historically, bull trout were probably distributed throughout the Blackfoot River
drainage. In addition, there was a connection between Clark Fork River fluvial bull trout
and Blackfoot River fluvial bull trout. Moomaw et al (1952) reported that the Salish
name for Missoula meant "bull trout" and the name for Bonner was like bull trout in
meaning except more and larger trout were found at this place. The Flatheads were
reported to have a campground at Milltown at the junction of the Blackfoot and Clark
Fork Rivers which was used for fishing for bull trout (Anon 1954).

The connection between the lower Clark Fork and the Blackfoot was broken by
the construction of Milltown Dam in the early 1900's. Each spring, concentrations of fish
are still observed at the base of Milltown Dam. In June, 1992, a 30 inch male and
female bull trout died in an accidental dewatering of the middle bay area of Milltown
Dam. It is assumed that these fish are attempting an upstream migration past the Dam.

Information from landowners and anglers indicates that Rock Creek (tnbutary to
the North Fork of the Blackfoot) and Beaver Creek contained bull trout in the past.
There is presently a lack of young-of-the-year (and older) bull trout in these streams,
although a rehabilitation effort is underway in Rock Creek (see below).

Current distribution

Bull trout populations in the Blackfoot River drainage have been the subject of
recent research efforts. The mainstem Blackfoot River contains populations of fluvial
bull trout. The abundance of these fish varies by reach. From the mouth of the
Blackfoot to the North Fork of the Blackfoot River, bull trout are considered uncommon
with a proportional number of large size fish, although the habitat is rated "A" -best
value habitat. From the North Fork of the Blackfoot River to Poorman Creek, Blackfoot
River bull trout are rare, and the habitat is rated a "B" - substantial value. From
Poorman Creek to the Landers Fork, bull trout are expected but not verified. From the
Landers Fork to the headwaters, bull trout are rare and the habitat has substantial value
(Tables 1 and 4) (Peters pers. comm. 1992).

Surveys of the Blackfoot River tributaries have found that, in general, tributaries
which flow south have bull trout, whereas tributaries which flow northward do not. Some
of the most important tributaries are Gold Creek, Copper Creek, Monture Creek,
Morrell Creek, the North Fork of the Blackfoot, and Belmont Creek. Some of these
tributaries have brook trout and some do not (Appendix A, Table 3). No genetic work
has been done to date on these streams.

In 1991, redd surveys were done on the North Fork of the Blackfoot and Monture
Creek. Counts were 26 and 25 redds, respectively.

Rock Creek (tributary to the North Fork of the Blackfoot River) has been
identified as an ancestral spawning stream for bull trout based on landowner mformation.
No young-of-the-year bull trout have been captured in the 1.2 mi long stream m over a
week of electrofishing effort. Brook trout, multiple passage barriers, and degraded
habitat are probably reasons for the loss. A stream restoration project (completed m
June, 1992) has significantly reversed degraded habitat condition. Creation of complex
pool habitats and removal of grade controlling structures have cleaned the channel ot
sediment. The stream has greatly increased capacity to keep itself clear of sediment m
the pools and riffles as a result of the work. Mature bull trout were observed m the
stream in July, 1992 (Peters pers. comm. 1992).

A number of lakes in the upper Blackfoot River drainage support adfluvial
populations of bull trout. The data on these populations is limited, but bull trout are
known to occur in Seeley Lake, Placid Lake, Rainey Lake, Lake Alva, and Lake Inez.
Rainey Lake is believed to have the most abundant bull trout population in this group
(Peters pers. comm, 1992).

A basin-wide catch and release only season was implemented m 1990 for bull
trout to reduce angler impacts. Misidentification of bull trout and compliance contmues
to plague the attempt at reducing bull trout mortality (Peters pers. comm. 1992).

In general, the status of bull trout in this drainage appears to be precarious. Of
the 98 reaches which are believed to have bull trout, none are rated as having abundant
bull trout, and in only 3 reaches are bull trout rated common. Bull trout are uncommon
in 41 reaches and rare in 31 reaches (Table 1). Brook trout are common throughout the
drainage, occurring in approximately 77% of the buU trout waters (Table 3). It vms
possible to calculate a risk of extinction factor for 65 of the bull trout reaches. The
lowest risk of extinction was a 5 (one reach - Copper Creek) and the highest was an 11
(one reach - Clearwater R. above Morrell Creek). The majority of the reaches (53)
rated between 8 - 10 (moderately high risk of extinction) (Table 6).

Hydrologic unit # 17010204 - The Qark Fork River from the Flathead River to
the Blackfoot River

Historic distribution

Populations of fluvial bull trout probably occurred throughout the drainage. This
portion of the Clark Fork River was probably not used by adfluvial bull trout from Lake
Pend Oreille because Thompson Falls may have been a natural migration barner. It is
unknown whether or not bull trout from Flathead Lake moved downstream out of the
lake into the lower Flathead River and potentially into this section of the Clark Fork
River. Although unusual, downstream migrations of adfluvial bull trout have been
documented in other locations (e.g. Bull Lake, Upper ^^f^^ake. Cracker l^ke)._^^
construction of Kerr Dam blocked fish passage between the lower Flathead\Clark Fork
River systems and Flathead Lake. The construction of MiUtown Dam blocked passage
between the Clark Fork River and the Blackfoot River.

Current distribution

In the mainstem Clark Fork River bull trout are rated as either rare or
uncommon, with a proportional number of large sized fish. The most important
spawning tributaries for fluvial bull trout in this reach of river are Cache Creek and
Montana Creek (tributaries of Fish Creek), the St. Regis River, and Trout Creek.

Other important bull trout streams are Cedar Creek, Cement Gulch Creek, Lost
Creek, Ward Creek, and the South Fk. of Little Joe Creek. It is not clear if these
tributaries are supporting resident or fluvial populations of bull trout (or both).

There are quite a few streams in this drainage where bull trout have been found
in very low numbers (one or two fish per sample). The implication is that these streams
were at one time bull trout streams which are no longer supporting healthy bull trout

populations. Streams in this category include Ninemile Creek, Petty Creek, Sixmile
Creek, Tamarack Creek, and the South Fork of Trout Creek.

The Montana Department of Fish, Wildlife, and Parks has gathered some
information on bull trout densities and redd counts in some of the critical bull trout
streams. This information is in draft form at this time but will be available soon on Fish
Creek, Cache Creek, Montana Creek, and Straight Creek. Of these streams. Cache
Creek appears to have the highest relative density of bull trout (13%) of the population,
however, hybridization with brook trout was noted in this population.

The construction of the Montana Water Co. Dam on Rattlesnake Creek blocked
fish passage between Rattlesnake Creek and the Clark Fork River. It is not known if
Clark Fork River bull trout successfully utilize the lower, accessible reaches of
Rattlesnake Creek below the dam, although adult bull trout congregate below the dam
annually in an attempt to migrate upstream. Above the dam. Rattlesnake Creek
supports a population of large size resident bull trout.

Overall, bull trout have a number of problems in this drainage. The connections
between the Clark Fork River and the upper Flathead system, the Blackfoot River, and
the lower Clark Fork River have been broken by dams. Many of the lower reaches of
the tributary streams have been impacted by habitat degradation, or are inaccessible due
to barriers. Mining activities in the headwaters of the drainage (Butte and Anaconda
area) have impacted water quality in the mainstem during recent history and these
impacts may be continuing into the present. Approximately 85% of the reaches
containing bull trout also contain brook trout (Table 3).

Given all these problems, it is not surprising that many of the bull trout
populations in this drainage have a high risk of extinction. Of the 119 reaches where a
risk of extinction could be calculated, 49 (41%) had a risk of extinction of 8 and 43
(36%) had a risk of extinction of 12 - the highest risk (Table 6). Streams with the
highest risk of extinction include Ninemile Creek (may already be extinct in this
drainage). Petty Creek, St Regis River, Sixmile Creek, Tamarack Creek, and the South
Fork of Trout Creek.

Hydrologic unit # 17010205 - the Bitterroot River drainage

Historic distribution

There are no major natural barriers to fish migration that would have excluded
bull trout from any significant portions of this drainage. Bull trout were likely distributed
throughout the drainage historically. There are reports of 20" bull trout being caught in
the Bitterroot River in the 1920's.

Current distribution

BuU trout appear to be extinct, or nearly so, from the mainstem Bitterroot River
from the mouth of the river to Blodgett Creek. From Blodgett Creek to the East Fk. of
the Bitterroot, bull trout are rare and the habitat is of substantial value (a "B" ratmg)
(Table 1, Table 4).

In general, the tributary streams contain small populations of small bull trout
(rarely over 12" in length) which are isolated from other bull trout waters. The
connections between the tributaries and the mainstem Bitterroot River have often been
severed by habitat degradation, dewatering, and passage barriers. Tributaries of the east
side of the valley tend to have more bull trout than on the west side of the valley. The
upper East Fork of the Bitterroot and the Skalkaho Creek area are refuge areas for bull
trout, while the upper West Fork has abundant brook trout.

An analysis of the sediment condition of the Bitterroot National Forest streams
indicates that about one third of the streams are in good shape, one third are in poor
shape, and one third are in critical condition. While bull trout are found in all three
types of streams, most of the healthier populations are found in the healthy dramages.

There are three streams (six reaches) which were rated as having abundant bull
trout: Meadow Creek, Daly Creek, and Sweathouse Creek. Bull trout are common in 31
reaches, uncommon in 57 reaches, and rare in 31 reaches. They are expected but not
verified in 16 reaches (Table 1). While these figures appear to show that bull trout are
widely distributed in the Bitterroot drainage, it must be considered that "rare" frequently
means that one or two bull trout were found in this stream at some time.

Brook trout are common in Bitterroot Valley streams. Approximately 75% of the
bull trout streams also contain brook trout (Table 3) . Some genetic analysis has been
done in the area. There are three streams that are known to contain hybridized brook
trout X bull trout populations and eight streams that are known to contain pure strain
bull trout.

The majority of the Bitterroot Valley waters have a moderate risk of extinction -
72% of the reaches had an extinction risk from 8 - 10 (Table 6). Overall, the drainage
has a large number of fragmented populations containing small numbers of small fish
with no genetic interchange.

The Upper Flathead River system above Kerr Dam

There is no concrete information on the historic abundance of bull trout in the
Flathead system, but it is clear that they were widely distributed throughout the drainage.
Some of the smaller tributary streams have waterfalls that could have prevented bull
trout colonization, but the major river systems were all open and interconnected.

Currently, the Flathead adfluvial bull trout population is probably one of the most viable
left in the United States.

The interconnectedness of the Flathead system has been disrupted by the
construction of hydroelectric facilities. Bigfork Dam, built in 1902, blocked fish migration
from Flathead Lake into the Swan River. Hungry Horse Dam, closed in 1953, blocked
fish migration into the South Fork of the Flathead River. Kerr Dam blocks fish passage
fi-om the lower Flathead River into Flathead Lake. It is estimated that Hungry Horse
and Bigfork Dams cut off 40% of the historic spawning grounds for Flathead Lake. Bull
trout persist above these facilities and their populations appear to be healthy. However,
these remnant populations are at risk and genetic exchange with the Flathead population
is essentially nil.

Recent monitoring data has caused concern about the status of bull trout in the
Flathead. Spawning redd counts showed major decreases in the North Fork Flathead
drainage in 1991 and in the Middle Fork drainage in 1990 and 1991. North Fork
tributary monitoring areas have averaged 229 redds during 12 years of annual counts
(1979 - 1990). This year's total of 146 is 36% below this annual average figure. The only
North Fork tributary with a higher than average figure was Big Creek Whale and Trail
creeks had extremely low redd numbers.

Redd counts in Middle Fork tributary areas have averaged 141 redds annually
during the 1979-1990 period. The 1991 total of 97 redds is 31% below this average
figure. The 1990 redd count in the Middle Fork was 46% lower than average.

There is no single obvious reason to account for the low escapement over the past
two years and it is not known if the decline is temporary or reflects a long term decline.
Factors affecting the 1991 spawning year class could include natural population
fluctuations, low water during winter 1984 - 85 (egg mortality), habitat changes both
natural and management related, drought in 1987 and 1988, predation by lake trout in
river and lake, overharvest of spawners, general overharvest, and changes in the food
web. The Montana Department of Fish, Wildlife, and Parks and the Confederated Salish
and Kootenai Tribes (who co-manage Flathead Lake) are proposing a reduction m bull
trout harvest as a short-term measure to halt the decline in bull trout. Long term
management strategies include habitat protection and enhancement and population
supplementation.

Status of bull trout in Glacier National Park

Bull trout occur in about a dozen west slope lakes and streams draining from
Glacier National Park to the North and Middle Forks of the Flathead River. In most
cases they co-exist with other native species including the westslope cutthroat trout
(Marnell pers. comm. 1992).

About half of these are large glacial fingers lakes lying between 3280 and 3940 ft
MSL in elongated valleys. Most of these waters have been invaded by non-native species
as a result of downstream fish introductions dating from around 1916. Many of these
lakes now contain lake trout, lake whitefish, and kokanee. An occasional rainbow trout
or brook trout is reported from Lake McDonald, the largest of these lakes (MameU pers.
comm. 1992).

Half a dozen small lakes in the interior of Glacier Park also harbor buU trout in
sympatry with other native fish species. While these lakes are believed to contain only
native species at the present time, several are vulnerable to invasion by non-native
species (MameU pers. comm. 1992).

Bull trout are also widely dispersed throughout the network of first and second
order tributaries in both the North and Middle Fork drainages of Glacier Park.
Generally, they are restricted to elevations below 4590 ft. MSL. due to natural bamers
characteristic of the park's mountainous topography (MameU pers. comm. 1992).

The staff of Glacier National Park are quite concerned about recent mass
movements of non-native fishes in the North and Middle Forks of the Flathead River. In
the falls of 1990 and 1991, large aggregations of Lake Superior whitefish and lake trout
were observed in the Middle Fork of the Flathead near West Glacier. These non-native
fish have the potential to impact buU trout populations which have not been previously
exposed to non-native fish. The Park staff is particularly concerned about possible lake
trout entry into Quartz Lake and the Camas Creek drainages in the North Fork of the
Flathead (Marnell pers. comm. 1992).

Bull trout management on the Flathead National Forest

The bulk of the Flathead system bull trout spawn in streams in the Flathead
National Forest. In February, 1990 the Flathead Forest amended the Land and
Resource Management Plan (LRMP) to revise the standards for bull trout. The
amended LRMP caUs for use of sediment models in 21 critical bull trout streams to
evaluate the effects of proposed development on buU trout habitat. In addition,
estimated increases in sediment delivery rates wiU be held to a level that does not pose a
significant threat of sediment deposition in spawning and rearing habitat. Research done
by the Flathead Basin Forest Practices, Water Quality, and Fisheries Cooperative
Program (FBCP) in 1991 defined a "threatened stream" as those having greater than 35%
fine sediment in spawning gravels and an "impaired stream" as those having greater than
40% fine sediment. The FBCP recommendation for impaired streams is for no
additional sediment loading and a rigorous program of controlling sediment from
previous disturbances. The Forest has pledged to abide by these fisheries
recommendations and is currently working on implementation guidelines to put this
policy into active use.

Hydrologic unit # 17010206 - the North Foik of the Flathead Rhrer
Historic distribution

The North Fork of the Flathead River drainage comprises one portion of the
upper Flathead River system. The North Fork of the Flathead has its headwaters in
Canada, then flows south bordered by Glacier National Park and the Flathead National
Forest. There are no natural fish passage barriers on the mainstem of the North Fork
which would have prevented bull trout from colonizing the river, although some of the
tributary streams have waterfalls which are fish passage barriers.

Current distribution

More data on bull trout have been collected in the North and Middle Forks of the
Flathead River than in any other drainage in Montana. These drainages support some of
the most pristine and healthy bull trout populations in the United States. The North
Fork drainage is particularly significant as it does not have brook trout. These facts are
refiected in the risk of extinction ratings for the North Fork which range from 3 (low risk
of extinction) to 8 (moderate risk of extinction) (Table 6).

In general, streams to the west of the North Fork of the Flathead support
adfluvial bull trout spawning, whereas tributaries on the east (draining Glacier National
Park) do not. However, some of the Glacier Park drainages contain relatively large lakes
with their own populations of adfluvial bull trout. The "crown jewels" of Glacier National
Park, in terms of bull trout, are Cerulean, Quartz, Middle Quartz, and Akakola Lakes.
These lakes have had no exposure to introduced fishes and still contain pristine habitat.
Bull trout co-exist with westslope cutthroat trout in these lakes (Marnell pers. comm.
1992).

Apparently healthy bull trout populations co-exist with cutthroat trout in Lower
Quartz Lake and Trout Lake in Glacier National Park. However, there has been a
recent unconfirmed report of a lake trout caught in Lower Quartz Lake which is a cause
of concern in this water (Marnell pers. comm 1992).

Arrow Lake was known to support bull trout in the 1960's, however no bull trout
have been caught in this lake in recent surveys. There is speculation that the 1964 flood
may have been a potential factor in the decline of bull trout in this lake (MarneU pers.
comm. 1992).

A unique population of bull trout occurs in Upper Kintla Lake in Glacier National
Park. Bull trout are the only species of fish which occur in this lake. It appears that bull
trout were not stocked in the lake, but rather ascended some barrier cascades, perhaps
during the late stages of glacial withdrawal. The presence of anomalous biochemical

alleles suggests long term isolation of the population from other bull trout. These fish
are lake outlet spawners (Mamell pers, comm 1992).

Bull trout co-exist with lake trout in Bowman and Logging Lakes. Creel survey
data and anecdotal reports suggest a decline of bull trout in Bowman Lake m recent
years. Logging Lake is still in near pristine condition and bull trout are abundant
(Marnell pers. comm. 1992).

Kintla Lake in Glacier National Park is severely compromised and bull trout are
now uncommon. This lake contains lake trout, lake whitefish, and kokanee.

The most significant spawning streams for adfluvial Flathead Lake bull trout in the
United States portion of the North Fork of the Flathead River drainage are Big,
Hallowat, South Coal, Coal, Mathias, Red Meadow, Whale, Shorty, and Trail creeks.
Streams in Canada support approximately 25% of the North Fork bull trout spawning.
The most significant streams in the Canadian portion of the drainage are Howell, Cabin,
Sage, and Kishenehn creeks.

Bull trout densities are monitored annually in the North Fork by the Montana
Department of Fish, Wildlife, and Parks through redd counts on four high density
spawning streams. In addition, periodic basinwide redd counts have been conducted
since 1980. Data from the annual monitoring is summarized in Table 8. Data fi-om the
basinwide monitoring for the North Fork is given in Table 9.

Monitoring of spawning gravel conditions has been done on three bull trout
spawning streams since 1981. These data indicate that Big and Coal cks have sediment
levels in excess of the 40% level recommended by the FBCP, while Trail Creek has
approximately 35% sediment. The data are available from the Flathead National Forest.

Surveys of juvenile bull trout densities in the North and Middle Fork found that
they averaged 4.6 bull trout > 75 mm/ 100 m. The range in the North Fork tributaries
was fi-om 1.7 (Red Meadow Creek) to 5.2 (Trail Creek).

Hydrologic unit # 17010207 - the Middle Fork of the Flathead River

Historic distribution

Bull trout were likely to have been distributed widely throughout the Middle Fork
drainage.

Table 8. Summary of the North Fork of the Flathead River bull trout spawning site
inventories from 1979-1991 in the stream sections monitored annually.

YEAR\STREAM

BIG

COAL

WHALE

TRAIL

(TOTAL)

1979

34'

117

1980

31'

130

1981

217

1982

211

406

1983

141

280

1984

133

227

1985

168"

1986

184

1987

143

277

1988

136

269 1

1989

119

224

1990

109

228 1

1991

146

(AVERAGE)

19.7

41.1

108.8

52.9

221.0

^ Counts may be low

due to mco

mplete sur

vey

High flows may have obliterated some redds

Table 9. Summary of the number of bull trout redds observed in the U.S. portion of the
North Fork of the Flathead drainage during basin-wide survey years.

fsTREAMVYEA
R

1980

1981

1982

1986

1991

(AVE)

1 ®^^

HALLOWAT

COAL

S.COAL

10 1

MATHIAS

RED
MEADOW

WHALE

101

236

107

SHORTY

TRAIL

101

TOTAL

11 —

171

321

600

266

226

317 1

Current distribution

The Middle Fork of the Flathead River is, along with the North Fork of the
Flathead and the Swan River, the stronghold for buU trout in Montana. Unlike the
North Fork, the Middle Fork does have some brook trout in a few locations. Bull trout
redd counts have been conducted in the Middle Fork since 1979, using the same strategy
as in the North Fork. The redd count data from the four key monitonng streams is given
in Table 10, and the data from the basin-wide surveys is in Table 11.

The only stream in the Middle Fork drainage where bull trout spawning gravels
have been monitored is Granite Creek. In the last decade, a pulse of sediment moved
through Granite Creek, raising the levels of fine materials in spawning gravel to 51% m
1986. By 1990, significant flushing had occurted and sediment levels had declined to
26%. A road induced slope failure in an upstream tributary is believed to be partly
responsible for the sediment pulse in Granite Creek.

Juvenile bull trout population densities ranged from 4.9 - 11.8 fish >. 75
mm/100m2 in the two Middle Fork tributaries sampled, Morrison Creek and Ole Creek.

Large numbers of brook trout may pose a threat to bull trout spawning in Bear
Creek (Vashro pers. comm. 1992).

Upper and Lower Isabel Lakes in Glacier National Park contain some unusual
bull trout. Bull trout in these lakes are more brightly colored, especially red, than is
usual. In addition, they tend to be slightly smaller than the cutthroat trout which are
present in these lakes. No bull trout larger than 300 mm has been collected to date. A
life history study is being planned by the Park staff (Marnell pers. comm. 1992).

Harrison Lake in Glacier National Park contains bull trout along with westslope
cutthroat trout, brook trout, and kokanee. Very little is known about the status of this
population of bull trout (Marnell pers. comm. 1992).

McDonald Lake contains bull trout, although lake trout is the dominant species in
the lake. Kokanee, lake whitefish, and an occasional rainbow or brook trout are also
seen. Bull trout are considered to be uncommon (Marnell pers. comm. 1992).

Hydrologic unit # 17010208 - Flathead Lake and the mainstem Flathead River
above Flathead Lake

Historic distribution

The Rathead River above Flathead Lake was used as a migration cortidor for bull
trout moving between Flathead Lake and their spawning areas in the tributaries. In
addition, there were likely fluvial populations of bull trout residing in the river and

Table 10. Summary of Middle Fork of the Flathead River bull trout spawning
site inventories from 1979-1991 in the stream sections monitored annually.

1 YEAR\STREAM

MORRISON

GRANITE

LODGEPOTF,

OLE

TOTA 1

1979

25'

71*

1980

142

1981

32*

14*

83*

II 1982

194 II

1983

156

1984

1985

173"

1986

167

1987

149

1988

160

1989

158

1990

1991

(AVE)

135

* Counts may be low due to incomplete survey " High flows may have obliterated some
redds

Table 11 - Results of basinwide bull trout redd counts conducted in the Middle Fork of
the Flathead River.

STREAM\YEAR

1980

1981

1982

1986

1991

(AVE) 11

NYACK

20 1

PARK

30 1

OLE

30 II

BEAR

18 1

LONG

—

10 1

GRANITE

28 1

MORRISON

LODGEPOLE

SCHAFER

DOLLY
VARDEN

CLACK

BOWL

—

STRAWBERRY

TRAIL

TOTAL

291

233

388

520

290

344

spawning in the tributary streams. There may have also been resident populations of bull
trout in the small streams that drain directly into the Flathead River.

Flathead Lake contained bull trout historically.

Current distribution

The importance of Flathead Lake and the upper Flathead River to bull trout
cannot be overemphasized. The upper Flathead system adfluvial bull trout population
may be the healthiest such population remaining in the United States. Due to the
complex life history requirements of bull trout, all parts of the system - lake, nver, and
tributaries - must be maintained in a healthy condition for bull trout to contmue to thnve
in these waters.

According to information gathered from the Montana Interagency Database, six
reaches of the Flathead River (from the mouth to the Middle Fork) and one tributary
(Truman Creek) contain bull trout (Appendix A). Bull trout in the Flathead River are
considered to be uncommon, with a proportional number of large size fish. The nyer is
used primarily as a migration corridor, no brook trout are present, and the habitat is
rated an "A" - best value habitat.

Truman Creek contains a resident population of uncommon bull trout. Brook
trout are also in the stream and the habitat value is not rated.

Bull trout in Flathead Lake are common, with a proportional number of large
sized fish, and the habitat is of the best value.

Hydrologic unit # 17010209 - the South Fork of the Flathead River

Historic distribution

Very little data are available concerning the South Fork of the Flathead before
1958. Prior to construction of Hungry Horse Dam the South Fork drainage was
considered the major spawning area for adfluvial stocks fi-om Flathead Lake. Hungty
Horse Dam was built without provisions to provide for fish passage. Consequently the
connection between the South Fork of the Flathead and the rest of the drainage was
broken. Approximately 38% of the total drainage area available for spawning salmomds
migrating upstream from Flathead Lake was permanently blocked. This habitat was
estimated to have supported between 1,840 and 2,089 adult bull trout (Zubik and Fraley
1986).

Current distribution

When Hungry Horse Dam was constructed, it trapped adfluvial bull trout destined
for Flathead Lake. These fish established an adfluvial stock in Hungry Horse Reservoir.

Sampling in the reservoir has found that bull trout numbers are highest in the
spring, intermediate in the fall, and lowest in the summer. The mean catches in sinking
gill nets ranged from 4.7 to 6.3 fish per net in May samples and fi-om 2.0 to 4.8 fish per
net in the fall collections. These catch rates from the 1980's are similar to catch rates
from sampling done in the early 1970's. The mean catches in the Sullivan area (upper
reservoir area) were consistently higher than in the other areas sampled. Bull trout
caught ranged in length from 170 mm to 910 mm (May et al 1988).

A creel census conducted in the summer of 1986 found that bull trout comprised
31% of the catch in Hungry Horse Reservoir (approximately 2,168 fish). The overall
angler catch rate for bull trout was 0.10 fish/hr, but this figure varied Avidely by area and
by season. The highest average catch rate was in the Sullivan area (0.26 fish/hr). For
the reservoir as a whole, the month of May had the highest catch rate (0.16 fish/hr) (May
and Weaver 1987).

Most of the spawning and rearing areas for bull trout in this drainage are located
in the backcountry areas of the Bob Marshall Wilderness Area so there has not been a
great deal of survey work done to date. Important spawning tributaries that are not in
designated wilderness are Wheeler, Sullivan, Quintonkin, and Bunker cks. as well as
portions of the Spotted Bear River.

In addition to the adfluvial bull trout population in Hungry Horse Reservoir, it is
likely there are also resident, fluvial, and other adfluvial populations within the drainage.
Big Salmon Lake and Doctor Lake are known to have adfluvial populations of bull trout.
Several other streams have bull trout as well, however many of the streams have barrier
falls which prevented bull trout from colonizing the headwaters areas (Sage pers. comm.
1992).

Hydrologic unit # 170101210 - the Stillwater River drainage

Historic distribution

Bull trout appear to have been distributed throughout the Stillwater River
drainage historically.

Current distribution

The lower portion of the Stillwater River, from the mouth to Hellroaring Creek, is
used primarily as a migration corridor for bull trout. This portion of the river has a risk

of extinction rating from 11 to 12 - high risk of extinction. This is due to the low
numbers of bull trout, low habitat value rating and the presence of brook trout. Ihe
upper portions of the Stillwater River support spawning and rearing of bull trout.
However, bull trout are still uncommon, and the habitat is rated a C - moderate value
habitat.

Several lakes in this drainage support adfluvial populations of bull trout: Cyclone
Lake Frozen Lake, Lower and Upper Stillwater Lakes, Upper Whitefish and Whitefish
Lakes and Tally Lake. Cyclone and Frozen Lakes have what appear to be the most
secure populations in the drainage, with best value habitat and no brook trout. However,
bull trout are uncommon in these lakes.

Tributary streams which contain bull trout are Logan Creek, Sunday Creek, Swift
Creek, and the East and West forks of Swift Creek.

Overall bull trout are relatively uncommon in this drainage probably due to the
large numbers of brook trout, roading, logging, and subdivision that has occurred m the
drainage.

Hydrologic unit # 17010211 - the Swan River drainage

Historic distribution

Historically, bull trout were able to migrate freely between the Swan River
drainage and the rest of the Flathead system. The construction of Bigfork Dam m 1902
blocked upstream fish passage from Flathead Lake into the Swan River. Tag^ng studies
done by Leathe and Enk (1985) indicated that the Swan River bull trout population is
essentially isolated.

Current distribution

Leathe and Enk (1985) in their survey of 74 tributary reaches in the Swan
drainage estimated that there were 31,000 stream dwelling bull trout in the Swan River
tributary system. They found that bull trout were not the dominant fish species m any
gradient category, but tended to be more abundant in reaches with a gradient of six
percent or less.

Sampling of the Swan River downstream of Cygnet Lake in 1982 found no bull
trout A few juvenile bull trout were captured from the Swan River between the Salmon
Prairie and the Piper Creek bridges, indicating that significant use of this reach of the
river by bull trout for anything other than a migration corridor was unlikely (Leathe and
Enk 1985).

Anglers fishing in the Swan River in 1983 - 1984 harvested an estimated 564 bull
trout with an average catch rate of 0.06 fish/hr. The harvest of bull trout from the
tributaries above Swan Lake was estimated at 296 fish with a catch rate of 0.07 fish/hr
(Leathe and Enk 1985).

Gill net surveys of Swan Lake found 0.3 bull trout per floating gill net and 3.7 bull
trout per sinking gill net. This latter rate is similar to catches from Flathead Lake. Most
of the bull trout captured in Swan Lake were taken in the north and middle sections of
the lake (Leathe and Enk 1985).

Bull trout were the third most abundant fish harvested from Swan Lake in the
1983 - 1984 season. The total harvest of 739 fish was distributed relatively evenly
throughout the year. The average bull trout catch rate was 0.26 fish/hr (Leathe and Enk
1985).

Redd surveys done from 1982 - 1991 in the four most heavily used tributary
streams located between 109 - 371 redds (Rumsey 1991) (Table 12). Seventy eight
percent of all the bull trout redds occurred in approximately 29 km of habitat located in
four streams - Elk, Lion, Goat and Squeezer cks (Tables 12 and 13). The most
concentrated spawning use in the drainage occurs each year in Elk Creek, where 44 to 52
redds were found in the most heavily used 1 km section (Leathe and Enk 1985). Based
on redd count information, spawner densities in Swan Lake appeared to be substantially
higher than those in Flathead Lake or Pend Oreille Lake, Idaho (Leathe and Enk 1985).
Redd counts in the Swan drainage in 1991 were 44.1% above the nine year average when
comparing streams monitored annually (Rumsey 1991).

The Swan River drainage also contains some isolated, resident bull trout
populations. The North Fork of Lost Creek is known to contain bull trout upstream of a
barrier falls. Other such resident populations may be found in the drainage in the future,
but to date relatively little research has been done (Enk pers. comm. 1992).

TABT F 12. Summary of Swan drainage bull trout spawning site inventories from 1982-
10Q1 in the. stream sections monitored annually (Rumsey 1991). ^

1 YEAR\STREAM

ELK

GOAT

SQUEEZER

LION

TOTAL

1982

193 1

1 1983

236 II

1984

295 1

1985

109" 1

1986

210 1

1987

162

290

1988

201

321' II

1989

186

371

1990

136

263 II

1991

140

101

366

1 (AVERAGE)

114

265 1

High flows may have obliterated some redds

TABLE 13. Bull trout redd counts from Swan drainage randomly monitored streams
(Rumsey 1991).

1 STREAM

1982

1983

1984

1989

1990

1991 1

Cedar

—

Cold

—

5 1

Glacier

—

Holland

—

30 1

—

Jim

40 1

North Lost

5 1

South Lost

Piper

—

—^

South
Woodward

—

Woodward

—

TOTAL

135

Some brook trout X bull trout hybridization has been documented in the Swan
River drainage (Weaver pers. comm. 1992).

More detailed information about the bull trout of the Swan River drainage is
available in Leathe et al (1985a and 1985b).

Hydrologic unit # 17010212 - the Flathead River below Flathead Lake

Historic distribution

It is clear that, historically, bull trout were found in all the major the tributary
streams draining the east side of the Flathead Indian Reservation Bull trout were
probably seasonally found in the Flathead River below Flathead Lake as well although
natural warm temperatures in this river may have limited bull trout during the sumnjer
months. In addition, bull trout may have migrated between Flathead Lake and the lower
River. The connection was broken between the lake and lower nver with the
construction of Kerr Dam in 1938.

The construction of the Flathead Agency Irrigation Project, beginning in the
1910's, broke the connection between many of the tributary streams and the Flathead

River. Cross and DosSantos (1988) estimated that construction of irrigation diversions,
canals, and dams on the tributaries eliminated access to more than 100 km of spawnmg
and rearing habitat.

The degree to which bull trout historically utilized the Little Bitterroot River
drainage, on the west side of the Reservation, is unknown. Bull trout are not currently
found anywhere within the drainage. It is possible that naturally warm water
temperatures and high turbidity prevented much buU trout colonization of this nver.
However, it is difficult to know what the natural conditions were like m this dramage.

Current distribution

Bull trout are the least common salmonid found in the lower Flathead River.
During extensive electrofishing surveys between 1983 and 1986, 17 bull trout were
captured, ranging in length from 190 to 850 mm TL. These fish averaged 480 mm TL
(Age 5) in length and 1,311 g in weight. The authors noted that bull trout captured in
the lower portions of the river were larger than those found in the upper portions of the
river (DosSantos et al 1988).

In the Jocko River, a small resident bull trout population is found upstream of the
Jocko "K" Canal, 42 km upstream of the mouth. The Jocko "K" Canal is a bamer to fish
movement (DosSantos et al 1988).

The construction of McDonald Lake Dam, Mission Dam, and St. Mary's Dam
trapped bull trout in the upper reaches of these drainages. These reservoirs now contam
adfluvial populations of bull trout. These status of these populations are unknown, but
these fish appear to be in a precarious situation. Research on these populations is
planned for the summer of 1992 (DosSantos, pers. comm. 1992).

Hydrologic unit # 17010213 - the Qark Fork River below the Flathead River

Historic distribution

Historically, the tributaries of this stretch of river were used for spawning by
adfluvial bull trout from Lake Pend Oreille. In addition, they likely supported fluvial bull
trout from the main river as well. The construction of a series of hydroelectric dams on
the Clark Fork River blocked the movement of fish between Lake Fend Oreille and the
upper tributaries. These dams have also isolated the fluvial bull trout stocks and
changed their habitat fi-om a river to a reservoir.

Echo (1954) stated that bull trout were among the game fish found in Thompson
Lakes. Bull trout are not recorded as being present in these lakes today.

Brunson (1952) trapped bull trout in the Bull River and Prospect Creek near
Thompson Falls. The traps were operated from August 1 - 8, 1950 at the mouths of the
creeks. He speculated that these fish were migrants fi-om the Clark Fork River and
possibly Lake Pend Oreille. The traps collected 51 breeding adults, 23 males and 28
females ranging in weight from 1 lb 10 oz to 8 lb 12 oz. Today bull trout are listed as
rare in the Bull River, and uncommon in Prospect Creek. As mentioned earlier, the
adfluvial run from Lake Pend Oreille can no longer access these waters.

Onishuk (1959) relates catching a large bull trout in White Pine Creek. This
stream is not listed in the database as containing bull trout today.

Opheim (1966) collected bull trout in Twelvemile Creek in July 1963. In this
study, four sections were sampled with an average of 5 - 7 bull trout/section. The
average length of these fish ranged from 6.0 - 7.9". Twelvemile Creek was also sampled
in 1953 and 1961. In 1953, one section was electrofished and no bull trout were found.
In 1961 three sections were sampled and no bull trout were found in two sections, but 5
bull trout were collected from the third section (Opheim 1966). More recent studies m
this stream have not found any bull trout, but lots of brook trout (Walker pers. comm. •
1992).

A few natural barriers existed - Vermillion Falls on the Vermillion River may have
been the upstream boundary for bull trout on this tributary. Thompson Falls may have
prevented upstream fish migration. However, bull trout were present above Thompson
Falls historically, as they are today.

Current distribution

Bull trout are uncommon in the mainstem of the Clark Fork River. A few fish
are known or expected to use Rock Creek, the Vermillion River, Cooper Creek, and Big
Spruce Creek (Table 1). Bull trout are rare in the Bull River and its tributanes. Several
tributary streams go dry at the lower ends due primarily to natural factors and this could
influence their usefulness to bull trout. Brook trout are present in about 85% of the bull
trout reaches (Table 3). Of the 50 reaches that could be evaluated for risk of extinction,
40 (80%) had a risk of extinction of 8 - moderate risk (Table 6).

Hydrologic unit #10010002 - St Mary's River drainage

Historic distribution

Bull trout are commonly found on both sides of the continental divide in Canada.
In Montana, the St. Mary's drainage is the only drainage east of the continental divide
known to have bull trout. The historic range and distribution of the species is unknown,
although Brown (1971) stated that bull trout are found throughout the Saskatchewan
River drainages in the state.

Current distribution

BuU trout are found in St. Mary Lakes and the St. Mary River on the Blackfeet
Indian Reservation. Spawning streams are likely Boulder Creel^ Divide Creek, Otatso
Creek, Kennedy Creek, and Lee Creek. There is no upstream fish passage past the Milk
River Irrigation Diversion. The status of these populations is unknovm, although they
are believed to have been impacted by non-native interactions (probably brook trout)
and agriculture.

Within Glacier National Park, Cracker Lake is a small headwaters lake situated
above several falls in the St. Mary drainage which contains a stunted population of bull
trout. Although no stocking records exist, bull trout were believed to have been
introduced near the turn of the century when a small copper mine was »" operation at
the site The genetic data available to date support the initial diagnosis that the
population was introduced (Marnell 1985). Bull trout in this lake are extremely
abundant, but stunted. Fish spawn at 250 mm in length in the outlet of the lake It
appears that Cracker Lake bull trout are feeding exclusively on plankton and detntus
(Marnell pers. comm. 1992).

Summary and conclusions

Bull trout are highly sensitive to environmental disturbance. In most areas of
Montana bull trout populations are clearly in decline. Only the upper Flathead dminage
and the Swan River drainage still support relatively healthy populations of large adfluvial
and fluvial bull trout that are able to complete long migrations to their spawning
tributaries Even these two populations are not safe from the impacts of dam building,
hSt degradation, over-haLst, hybridization with brook trout, and competition with
other non native species. Particularly in the upper Flathead system, concern h^ been
e^ressed about the status of this population given the low redd counts found the last
year or two.

The Rock Creek drainage (tributary to the upper Clark Fork River) seems to
have relatively abundant numbers of bull trout. While man-caused habitat alterations m
L drainage have been relatively minor, brook trout are found ^-^^^^^^^^^^^^^^^^
many of its tributaries. Some hybridization is suspected to have occurred. This drainage
n not contain any large lakes which could support large adfluvial bull trout, such as
are found in the Flathead system.

In the rest of the historic range of bull trout within Montana, bull trout are largely
relegated to small, isolated, resident populations. The Blackfoot River and the Kootenai
Rive'r still support small populations of fluvial bull trout, but the """jf^ ^^ ;"^»*f ^^
supporting these populations is low. They appear to be at a relatively high nsk of
becoming extinct Bull trout are rare in most of the other large nvers m western
Montana.

A number of smaller lakes support adfluvial populations of bull trout. Glacier
National Park contains some of the most significant and pristine populations of this type.

To date, most of the research on bull trout has been concentrated on the larger,
migratory populations. It is likely that there are additional resident populations in
Montana that have not yet been documented. There is relatively little mformation
available about the life history and limiting factors of these populations.

The genetic information available makes it clear that in order to preserve genetic
diversity in bull trout, every population needs to be protected. Changes m land use and
fisheries management may be needed to protect this fish in its remammg habitat.

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Marotz, B. 1992. Personal communication. Montana Department of Fish, Wildlife and
Parks, KalispeU.

May, B., J.E. Huston, and S. McMullin. 1979. Lake Koocanusa post-impoundment

fisheries study. Completion Report. Montana Department of Fish, Wildlife and
Parks, KalispeU, Montana.

May, B. and T. Weaver. 1987. Quantification of Hungry Horse Reservoir water levels
needed to maintain or enhance reservoir fisheries. Annual Report 1986.
Montana Department of Fish, Wildlife and Parks, Kalispell, Montana. Prepared
for Bonneville Power Administration, Portland, Oregon. Contract No. DE-AI79-
84BP12659. Project No. 83-465.

May B. and 7 other authors. 1988. Quantification of Hungry Horse Reservoir water level
needed to maintain or enhance reservoir fisheries. Methods and data summary
1983-1987. Montana Department of Fish, Wildlife and Parks, Kalispell, Montana.
Prepared for Bonneville Power Administration, Portland, Oregon. Contract No.
DE-AI79-84BP12659. Project No. 83-465.

McCart, P. 1985. Parallels between life histories of bull trout and far northern species, in
D.D. McDonald, ed. Proceedings of the Flathead Basin bull trout biology and
population dynamics modeling exchange. Fisheries Branch, British Columbia
Ministry of Environment, Cranbrook, British Columbia.

McPhail, J.D. and C.B. Murray. 1979. The early life history and ecology of Dolly Varden
r Salvelinus malma^ in the upper Arrow Lakes. Department of Zoology and
Institute of Animal Resources, University of British Columbia, Vancouver, Bntish
Columbia. 113 p.

Montana Department of Fish, Wildlife and Parks. 1992. Status of bull trout in the
Flathead drainage - Draft. Kalispell, Montana.

Moomaw, Cannon, and Hoyt. 1952. An Archeological Survey of the Missoula Valley.

Moyle, P.B. 1976. Inland Fishes of California. University of California Press.

Nelson, J.S. 1965. Effects of fish introductions and hydroelectric development on fishes in
the Kamamskis River system. Alberta. J. Fish. Res. Bd. Can. 22: 721-753.

Oliver G. 1979. A final report on the present fisheries use of the Wigwam River with an
'emphasis on the migratory life history and spawning behavior of Dolly Varden
char, Salvelinus malma (Walbaum). Fisheries investigations m tributaries of the
Canadian portion of Libby Reservoir. British Columbia Fish and Wildlife Branch,
Victoria, British Columbia, cited in: Willamette National Forest. 1989. Biology of
the bull trout r Salvelinus confluentusV a literature review. Eugene, Oregon.

Onishuk, M. 1959. Poor man's salmon. Montana Sports Outdoors. 1: 9 - 13.
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Peters, D. 1992. Personal communication. Montana Department of Fish, Wildlife and
Parks, Missoula, Montana,

Pratt K.L 1984. Habitat selection and species interactions of juvenile westslope

' cutthroat trout and bull trout in the upper Flathead River basin. Master s thesis,
University of Idaho, Moscow, Idaho.

Pratt K 1985. Habitat preferences of juvenile bull trout in the Flathead River basin, in
' D D McDonald, ed. Proceedings of the Flathead Basin bull trout biology and
population dynamics modeling exchange. Fisheries Branch, British Columbia
Ministry of Environment, Cranbrook, British Columbia.

Pratt K.L. 1992. A review of bull trout life history, in: Howell, P.J. and D.V. Buchanan,
' eds. Proceedings of the Gearhart Mountain bull trout workshop. Oregon Chapter
of the American Fisheries Society, Corvallis, Oregon. 67 p.

Ratliff, D, 1987. Bull trout spawning report, Metolius River tributaries, 1987. Portland
General Electric, Portland, OR. cited in: Willamette National Forest. 1989.
Biology of the bull trout ( <g«lvp.liniis cnnfluentus) : a literature review. Eugene,
Oregon.

Ratliff D.E. and P.J. Howell. 1992. The status of bull trout populations in Oregon, in

Howell, P.J. and D.V. Buchanan, eds. Proceedings of the Gearhart Mountain bull
trout workshop. Oregon Chapter of the American Fisheries Society, Corvalhs,
Oregon. 67 p.

Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.H. Lachner, R.N. Lea and W.B.
Scott 1980. A list of common and scientific names of fishes from the Uniteo
States and Canada. American Fisheries Society Special Publication 12, Bethesda,
Maryland.

Rode M 1990. Bull trout, Salvelinus confluentus Suckley, in the McCloud River: Status
' and recovery recommendations. California Department of Fish and Game, Inland
Fisheries Administrative Report No. 90-15.

Rumsey, S. 1991. Interoffice memorandum to Swan drainage files. Montana
Department of Fish, Wildlife and Parks, Kalispell, Montana.

Sage, K. 1992. Personal communication. University of Montana, Missoula, Montana.

Scott, W.B. and E.J. Grossman. 1973. Freshwater Fishes of Canada. J. Fish. Res. Bd.
Can., Bulletin 184.

Shepard B B. 1985. Habitat variables related to bull trout spawning site selection and
thermal preference exhibited in a thermal gradient, in: D.D. McDonald, ed.
Proceedings of the Flathead Basin bull trout biology and population dynamics
modeling exchange. Fisheries Branch, British Columbia Ministry of Environment,
Cranbrook, British Columbia.

Shepard, B.B. and P. Graham. 1983. Rathead River Fisheries Study. Montana
Department of Fish, Wildlife and Parks, Kalispell, Montana.

Shepard, B.B., K. Pratt, and P.J. Graham. 1984. Ufe histories of westslope cutthroat

and bull trout in the upper Flathead River basin, Montana. Montana Department
of Fish, Wildlife and Parks, Kalispell, Montana.

Simpson, J.C. and R.L. Wallace. Fishes of Idaho. University Press of Idaho, Moscow.

Skaar, D. 1992. Memorandum to Jim Vashro. Montana Department of Fish, Wildlife and
' Parks, Libby Field Station, Libby, Montana.

Vashro, J. 1992. Personal communication. Montana Department of Fish, WildUfe and
Parks, Kalispell, Montana.

Wallis O L 1948 Trout studies and a stream survey of Crater Lake National Park.
'mS Thesis. Oregon State University, Corvallis, Oregon, cited in: Willamette
National Forest. 1989. Biology of the bull trout (Salvelinus confluentus): a
literature review. Eugene, Oregon.

Walker, K. 1992. Personal communication. U. S. Forest Service, Lolo National Forest,
Missoula, Montana.

Weaver T 1985. Bull trout incubation, in D.D. McDonald, ed. Proceedings of the
Flathead Basin bull trout biology and population dynamics modeling exchange.
Fisheries Branch, British Columbia Ministry of Environment, Cranbrook, British
Columbia.

Weaver, T. 1992. Personal communication, Montana Department of Fish, Wildlife and
Parks, Kalispell, Montana.

Weaver, T. and J.J. Fraley. 1991. Flathead Basin Forest Practices Water Quality and

Fisheries Cooperative Program: Fisheries Habitat and Fish Populations. Flathead
Basin Commission, Kalispell, Montana.

Weaver, T.M. and R.G. White. 1985. Coal Creek fisheries monitoring study no III.
Final Report. Montana Cooperative Fisheries Research Unit, Bozeman,
Montana.

Willamette National Forest. 1989. Biology of the bull trout (Salvelinus confluentus) : a
literature review. Eugene, Oregon.

Zubik, R.J. and J.J. Fraley. 1986. Determination of fishery losses in the !Jathead ^tem
resulting from the construction of Hungry Horse Dam. Montana Department of
Fish Wildlife and Parks, Kalispell, Montana. Prepared for Bonneville Power
Administration, Portland, Orejon. Contract No. DE-AI79-85BP23638. Project No.

85-23.

A ppendix A

BULL TROUT INFORMATION AVAILABLE

ON THE MONTANA INTERAGENCY DATABASE

STATUS OF BULL TROUT IN MONTANA
Upper Kootenai Drainage #17010101
Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat Risk

Rating

....

BEAR CR

MOUTH

CABLE CR

18900.00

BEAR CR

CABLE CR

HEADWATERS

18901.00

BIG CR

L KOOCANUSA

LITTLE NORTH FORK CR

14200.00

BIG CR

LITTLE NORTH FORK CR

STEEP CR

14400.00

BIG CR

STEEP CR

GOOD CR

14400.13

BIG CR

GOOD CR

BIG CR, N FK

14401.00

BLUE SKY CR

MOUTH

HEADWATERS

12400.00

CABLE CR

MOUTH

HEADWATERS

19100.00

CALLAHAN CR

MOUTH

FALLS

00601.00

CALLAHAN CR

MOUTH

FALLS

00601.00

CALLAHAN CR

GOAT CR

N CALLAHAN CR

00602.00

CAMP CR

MOUTH

HEADWATERS

02600.00

CLARENCE CR

MOUTH

STAHL CR

12800.00

8
8

CLARENCE CR

STAHL CR

HEADWATERS

12801.00

CRAZYMAN CR

DEEP CR

JUNCTION UITH

FORTIN

3.6 MILES ABOVE MOUl

22900.00

DEEP CR

3.6 MILES ABOVE MOUT

HEADWATERS

22900.00

FORTINE CR

MOUTH

DEEP CR

11100.00

FORTINE CR

DEEP CR

MURPHY CR

11101.00

FORTINE CR

WJRPHY CR

BRIMSTONE CR

11200.00

FORTINE CR

BRIMSTONE CR

EDNA CR

11201.00

FORTINE CR

EDNA CR

STEWART CR

11400.00

FORTINE CR

STEWART CR

BEAVER CR

11401.00

FORTINE CR

BEAVER CR

SWAMP CR

11402.00

FOUNDATION CR

MOUTH

HEADWATERS

12700.00

GRANITE CR

MOUTH

SNOW CR

04000.00

GRANITE CR

SNOW CR

HEADWATERS

04001.00

GRAVE CR

MOUTH

WILLIAMS CR

12100.00

GRAVE CR

CLARENCE CR

BLUE SKY CR

12300.00

GRAVE CR

BLUE SKY CR

FOUNDATION CR

12500.00

GRAVE CR

WILLIAMS CR

CLARENCE CR

17500.00

HOODOO CR

MOUTH

HEADWATERS

19400.00

KEELER CR

MOUTH

KEELER CR, N FK

01500.00

KEELER CR

KEELER CR, N

KEELER CR, S FK

01700.00

KEELER CR

KEELER CR, S

KEELER CR, W FK

01800.00

KEELER CR, N FK

MOUTH

HEADWATERS

01600.00

KEELER CR, S FK

MraiTH

HEADWATERS

01900.00

KOOTENAI R

YAAK R

STAR CR

00100.00

KOOTENAI R

STAR CR

RUBY CR

00300.00

KOOTENAI R

RUBY CR

CALLAHAN CR

00500.00

KOOTENAI R

CALLAHAN CR

LAKE CR

01100.00

KOOTENAI R

LAKE CR

O'BRIEN CR

01200.00

KOOTENAI R

O'BRIEN CR

KOOT CR

02800.00

KOOTENAI R

KOOT CR

CHINA CR

02801.00

KOOTENAI R

CHINA CR

WILLIAMS CR

02802.00

KOOTENAI R

WILLIAMS CR

BURRELL CR

02803.00

KOOTENAI R

BURRELL CR

QUARTZ CR

02804.00

KOOTENAI R

QUARTZ CR

CEDAR CR

02900.00

KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
KOOTENAI R
LAKE CR
LAKE CR
LAKE CR
LAKE CR
LAKE CR
LAKE CR
LAKE CR
LEWIS CR
LIBBY CR
LIBBY CR
LIBBY CR
LIBBY CR
LIBBY CR
LIBBY CR
LIBBY CR
LIBBY CR
LIBBY CR

LITTLE CHERRY CR
MEADOW CR
MIDAS CR
MURPHY CR
N CALLAHAN CR
O'BRIEN CR
O'BRIEN CR

PINKHAM CR

PIPE CR

PIPE CR, E FK

POORMAN CR

QUARTZ CR

QUARTZ CR, W FK

RAMSEY CR

S CALLAHAN CR

STAHL CR

STANLEY CR

THERRIAULT CR

TOBACCO R

CEDAR CR

BOBTAIL CR

03100.00

BOBTAIL CR

PIPE CR

03200.00

PIPE CR

PARICNTER CR

03300.00

PARMENTER CR

FLOWER CR

03500.00

FLOWER CR

LIBBY CR

03700.00

LIBBY CR

MITCHELL CR

05300.00

MITCHELL CR

RAINY CR

05301.00

RAINY CR

KENNEDY GULCH

05400.00

KENNEDY GULCH

FISHER R

05401.00

ALEXANDER CR

L KOOCANUSA

05600.00

DUNN CR

ALEXANDER CR

17200.00

FISHER R

DUNN CR

17400.00

FALLS CR

IRON CR

01400.00

IRON CR

COPPER CR

01401.00

COPPER CR

KEELER CR

01402.00

KEELER CR

PORCUPINE CR

02000.00

CAMP CR

DRY CR

02100.00

DRY CR

STANLEY CR

02101.00

STANLEY CR

BULL L

02102.00

MOUTH

HEADWATERS

12600.00

MOUTH

BIG CHERRY CR

03800.00

BIG CHERRY CR

HOODOO CR

04600.00

HOODOO CR

BEAR CR

04601.00

BEAR CR

LITTLE CHERRY CR

04602.00

LITTLE CHERRY CR

MIDAS CR

04601.00

MIDAS CR

POORMAN CR

04604.00

POORMAN CR

RAMSEY CR

04800.00

RAMSEY CR

HOWARD CR

05000.00

HOWARD CR

HEADWATERS

05100.00

MOUTH

HEADWATERS

19200.00

MOUTH

HEADWATERS

19300.00

MOUTH

MURPHY L

11900.00

MOUTH

HEADWATERS

00700.00

MOUTH

O'BRIEN CR, N FK

16200.00

O'BRIEN CR, N FK

HEADWATERS

16201 .00

L KOOCANUSA

UNNAMED

10500.00

UNNAMED

HEADWATERS

10501.00

MOUTH

DOAK CR

15700.00

DOAK CR

NOISY CR

15701.00

NOISY CR

PIPE CR, E FK

15702.00

PIPE CR, E FK

HEADWATERS

15900.00

MOUTH

UNNAMED

15800.00

UNNAMED

15801.00

UNNAMED

HEADWATERS

15802.00

MOUTH

HEADWATERS

04700.00

MOUTH

QUARTZ CR, W FK

16100.00

QUARTZ CR, W FK

HEADWATERS

16101.00

MOUTH

HEADWATERS

22600.00

MOUTH

HEADWATERS

04900.00

MOUTH

GLAD CR

00800.00

MOUTH

HEADWATERS

21100.00

MOUTH

HEADWATERS

17900.00

MOUTH

MUD CR

21200.00

MUD CR

HEADWATERS

21400.00

L KOOCANUSA

INDIAN CR

10800.00

INDIAN CR

SINCLAIR CR

10900.00

SINCLAIR CR

THERRIAULT CR

11000.00

TOBACCO R

THERRIAULT CR

GRAVE CR

11001.00

WIGWAM R

MOUTH

RICH CR

16500.00

WIGWAM R

RICH CR

HEADWATERS

16600.00

WILLIAMS CR

MOUTH

HEADWATERS

12200.00

YOUNG CR

L KOOCANUSA

YOUNG CR, S

13600.00

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

BULL L

MOUTH

GLEN L

L KOOCANUSA

MOUTH

N0N_TRANSP0RT REACH 02300.00
NON TRANSPORT REACH 05800.00

A
A
A

STATUS OF BULL TROUT IN MOMTAMA
fisher River Drainage #17010102
Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance

Use

Genetics
Rating

Habitat Risk
Rating

FISHER R

MOUTH

BUTLER CR

00100.00

C
C

FISHER R

BUTLER CR

PEOPLES CR

00?00.00

FISHER R

PEOPLES CR

BUCK CR

00201.00

FISHER R

BUCK CR

ALDER CR

00400.00

FISHER R

ALDER CR

COOY CR

00500.00

FISHER R

CODY CR

DOE CR

00600.00

FISHER R

DOE CR

FAWN CR

00601.00

C
C

FISHER R

FAUN CR

WOLF CR

00602.00

FISHER R

WOLF CR

PECOLET CR

00700.00

PECOLET CR

COW CR

00900.00

FISHER R

COW CR

SNELL CR

01000.00

c
c

FISHER R

SNELL CR

HARRIS CR

01001.00

FISHER R

HARRIS CR

MCKILLOP CR

01200.00

FISHER R

MCKILLOP CR

SQUAW CR

01201.00

FISHER R

SQUAW CR

SMOKE CR

01202.00

FISHER R

SM(»CE CR

MILLER CR

01203.00

FISHER R

MILLER CR

WEST FISHER CR

01400.00

FISHER R

WEST FISHER

PLEASANT VALLEY

FISH 01800.00

PLEASANT VALLEY FISH

MOUTH

MCGINNIS CR

02000.00

c
c

PLEASANT VALLEY FISH

MCGINNIS CR

LOON L

02400.00

WOLF CR

MOUTH

CALX CR

03400.00

WOLF CR

CALX CR

KAVALLA CR

03600.00

WOLF CR

KAVALLA CR

LITTLE WOLF CR

03800.00

WOLF CR

LITTLE WOLF

DRY FC»K CR

04000.00

WOLF CR

DRY FORK CR

HEADWATERS

04100.00

Lakes

Lake Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

STATUS OF BULL TROUT IN MONTANA
Yaak River Draitwge #17010103
Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat Risk

Rating

YAAK R

MOUTH

ARBO CR

00100.00

YAAK R

ARBO CR

SEVENTEEN MILE CR

00101.00

YAAK R

MOUTH

YAAK FALLS

00101.00

YAAK R

MOUTH

YAAK FALLS

00101.00

YAAK R

SEVENTEEN MILE CR

INDEPENDENCE CR

00500.00

YAAK R

INDEPENDENCE CR

BURNT CR

00501.00

YAAK R

BURNT CR

LITTLE CR

00700.00

YAAK R

LITTLE CR

RED TOP CR

00701.00

YAAK R

RED TOP CR

MEADOW CR

00800.00

YAAK R

MEADOW CR

HELLROARING CR

00801 .00

YAAK R

HELLROARING CR

SHINE CR

00900.00

YAAK R

SHINE CR

OTIS CR

00901.00

YAAK R

OTIS CR

SPREAD CR

00902.00

YAAK R

SPREAD CR

PHEASANT CR

01000.00

YAAK R

PHEASANT CR

GUS CR

01001.00

YAAK R

GUS CR

PETE CR

01002.00

YAAK R

PETE CR

COOL CR

01100.00

YAAK R

COOL CR

LANG CR

01300.00

YAAK R

LANG CR

YAAK R, S FK

01301 .00

YAAK R

YAAK R, S FK

UNNAMED

01700.00

YAAK R

UNNAMED

VINAL CR

01900.00

YAAK R

VINAL CR

YAAK R, W FK

02100.00

YAAK R

YAAK R, U FK

YAAK R, E FK

02200.00

YAAK R

YAAK R, E FK

HEADWATERS

03000.00

Lakes

Lake Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

STATUS OF BULL TROUT IN MONTANA
Lower Kootenai Drainage #17010104
Streams

stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics Habitat Risk
Rating Rating

KOOTENAI R
KOOTENAI R
KOOTENAI R

BOULDER CR
ROCKY CR
PINE CR

ROCKY CR
PINE CR
YAAK R

03900.00 V
03901 .00 V
04000.00 V

A
A
A

E N
E N
E N

Lakes

Lake Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

STATUS OF BULL TROUT IN MOMTAMA
Upper Clark Fork #17010201
Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat Risk

Rating

BARKER CR

MOUTH

HEADWATERS

11000.00

CLARK FK R

BLACKFOOT R

ALLEN CR

00100.00

CLARK FK R

ALLEN CR

SCHWARTZ CR

00101.00

CLARK FK R

SCHWARTZ CR

ROCK CR

00300.00

CLARK FK R

ROCK CR

CRAMER CR

00400.00

CLARK FK R

CRAMER CR

GILLESPIE CR

00500.00

CLARK FK R

TYLER CR

HARVEY CR

00700.00

CLARK FK R

HARVEY CR

BEAR CR

00900.00

CLARK FK R

BEAR CR

FLINT CR

01000.00

CLARK FK R

FLINT CR

DUNKLEBERG CR

01100.00

CLARK FK R

DUNKLEBERG CR

HOOVER CR

01300.00

CLARK FK R

HOOVER CR

GOLD CR

01400.00

CLARK FK R

GOID CR

BROCK CR

01800.00

CLARK FK R

BROCK CR

WARM SPRINGS CR

01900.00

CLARK FK R

WARM SPRINGS CR

ROCK CR

02000.00

CLARK FK R

ROCK CR

LITTLE BLACKFOOT R

02200.00

CLARK FK R

LITTLE BLACKFOOT R

MULLAN GULCH

02300.00

CLARK FK R

MULLAN GULCH

FRED BURR CR

02500.00

CLARK FK R

FRED BURR CR

COTTONWOOD CR

02600.00

CLARK FK R

COTTONWOOD CR

TINCUP CR

02700.00

CLARK FK R

TINCUP CR

PETERSON CR

02900.00

CLARK FK R

PETERSON CR

POWELL CR

03000.00

CLARK FK R

POWELL CR

DEMPSEY CR

03200.00

CLARK FK R

DEMPSEY CR

OROFINO CR

03400.00

CLARK FK R

OROFINO CR

RACETRACK CR

03500.00

CLARK FK R

RACETRACK CR

MODESTY CR

03900.00

CLARK FK R

MODESTY CR

DRY COTTONWOOD CR

04100.00

CLARK FK R

DRY COTTONWOOD CR

LOST CR

04200.00

CLARK FK R

LOST CR

WARM SPRINGS CR

04400.00

HARVEY CR

MOUTH

EIGHTMILE CR

00800.00

HARVEY CR

EIGHTMILE CR

HEADWATERS

00801.00

LITTLE BLACKFOOT R

DOG CR

TELEGRAPH CR

08000.00

LITTLE BLACKFOOT R

TELEGRAPH CR

ONTARIO CR

08100.00

LITTLE BLACKFOOT R

ONTARIO CR

HEADWATERS

08200.00

ROCK CR

MOUTH

ROCK CR LAKE

02100.00

ROCK CR

ROCK CR LAKE

HEADWATERS

02101 .00

SCHWARTZ CR

MOUTH

HEADWATERS

00200.00

STORM LAKE CR

MOUTH

CABLE CR

04600.00

STORM LAKE CR

CABLE CR

CANAL

04601.00

STORM LAKE CR

CANAL

STORM L

04800.00

TUIN LAKES CR

MOUTH

HEADWATERS

04900.00

WARM SPRINGS CR

MOUTH

BARKER CR

04500.00

WARM SPRINGS CR

BARKER CR

TWIN LAKES CR

04500.13

WARM SPRINGS CR

STORM LAKES CR

HEADWATERS

04700.00

WARM SPRINGS CR

MOUTH

BEAR GULCH

09500.00

Lake Name Lower Boundary Upper Boundary RRM Abundance Use Genetics Habitat Risk

Rating Rating

LOWER TWIN L
SILVER L
UPPER TWIN L

04301.00

05401.00

E NO

E N

STATUS OF BULL TROUT IN MONT AHA
Flint-Rock Drainage #17010202
Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics
Rating

Habitat Risk
Rating

ALDER CR

MOUTH

HEADWATERS

10
6
6
6
6
7

5
7

BOULDER CR

MOUTH

SOUTH BOULDER CR

04500.00

BOULDER CR

SOUTH BOULDER CR

SWAMP GULCH CR

04700.00

BOULDER CR

SWAMP GULCH CR

COPPER CR

04900.00

BOULDER CR

COPPER CR

ROYAL GOLD CR

04901.00

smiLDER CR

ROYAL GOLD CR

HEADWATERS

04902.00

BREWSTER CR

MOUTH

HEADWATERS

06600.00

BUTTE CABIN CR

MOUTH

AMMON GULCH

05000.00

BUTTE CABIN CR

AMMON GULCH

WAPATO GULCH

05001.00

BUTTE CABIN CR

WAPATO GULCH

BUTTE CANYON CR TRIB 05002.00

BUTTE CABIN CR
CINNAMON BEAR CR

BUTTE CANYON CR TRIB
MOUTH

HEADWATERS
HEADWATERS

05003.00

B
C

E
B

COPPER CR

MOUTH

LUTZ CR

02200.00

COPPER CR

MOUTH

UNNAMED

05700.00

COUGAR CR

MOUTH

HEADWATERS

05300.00

DOUGLAS CR

MOUTH

SETTLING P<»ID

05400.00

DOUGLAS CR

SETTLING POND

HEADWATERS

05400.00

FLINT CR

MOUTH

LOWER WILLOW CR

03200.00

FLINT CR

LOWER WILLOW CR

DOUGLAS CR

03600.00

FLINT CR

DOUGLAS CR

SMART CR

03601 .00

FLINT CR

SMART CR

RniLDER CR

03602.00

FLINT CR

BOULDER CR

MARSHALL CR

03700.00

FLINT CR

MARSHALL CR

DOUGLAS CR

03701.00

FLINT CR

DOUGLAS CR

FRED BURR CR

03702.00

FLINT CR

FRED BURR CR

TROUT CR

03800.00

FLINT CR

TROUT CR

GEORGETOWN L

04000.00

GILBERT CR

MOUTH

GILBERT RES

00200.00

11
7
7
8
8
8
8
8

HOGBACK CR

MOUTH

HEADWATERS

05200.00

RANCH CR

MOUTH

HEADWATERS

03100.00

ROCK CR

MOUTH

KITCHEN GULCH

00100.00

ROCK CR

KITCHEN GULCH

GILBERT CR

00101.00

ROCK CR

GILBERT CR

SPRING CR

00300.00

ROCK CR

SPRING CR

BREWSTER CR

00300.13

ROCK CR

BREWSTER CR

SAWMILL CR

00301 .00

ROCK CR

SAWMILL CR

RANCH CR

00500.00

ROCK CR

RANCH CR

WELCOME CR

00600.00

ROCK CR

WELCOME CR

HARRY'S GULCH

01000.00

ROCK CR

HARRY'S GULCH

BUTTE CABIN CR

01001.00

ROCK CR

BUTTE CABIN CR

WAHLQUIST CR

01100.00

ROCK CR

WAHLQUIST CR

COUGAR CR

01101.00

ROCK CR

COUGAR CR

HOGBACK CR

01102.00

ROCK CR

HOGBACK CR

WYMAN CR

01103.00

ROCK CR

WYMAN CR

WILLIAMS GULCH

01300.00

ROCK CR

WILLIAMS GULCH

STONEY CR

01301.00

ROCK CR

STONEY CR

UPPER WILLOW CR

01500.00

ROCK CR

UPPER WILLOW CR

ANTELOPE CR

01600.00

ROCK CR

ANTELOPE CR

ROCK CR, M FK

01601.00

ROCK CR, E FK

ROCK CR, M FK

MEADOW CR

02600.00

ROCK CR, E FK

MEAOOU CR

ROCK CR RES

02800.00

ROCK CR, H FK

MOUTH

ROCK CR, E FK

02000.00

ROCK CR, M FK

ROCK CR, E FK

COPPER CR

02100.00

ROCK CR, ROSS

MOUTH

ELK CR

01900.00

ROCK CR, ROSS

FK, S

MOUTH

HEADWATERS

05100.00

ROCK CR, U FK

MOUTH

ROCK CR, ROSS FK

01700.00

ROCK CR, U FK

ROCK CR, ROSS FK

ROCK CR, N FK

01800.00

ROCK CR, W FK

ROCK CR, N FK

HEADWATERS

01801.00

STONEY CR

MOUTH

HEADWATERS

01400.00

WAHLCHilST CR

MOUTH

HEADWATERS

04200.00

WELCOME CR

MOUTH

CINNABAR CR

00700.00

WELCOME CR

CINNABAR CR

HEADWATERS

00800.00

WYMAN CR

MOUTH

HEADWATERS

01200.00

WYMAN GULCH

MOUTH

HEADWATERS

05600.00

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRH

Abundance Use

Genetics Habitat Risk
Rating Rating

EAST FORK RES
KAISER L
MOOSE L

R A
R A
R A

stream Name

Louer Boundary

STATUS OF BULL TROUT IN MONTANA
Blackfoot Drainage #17010203
Streams

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

ALICE CR
ALICE CR
ALICE CR
ARRASTRA CR
ARRASTRA CR
BEAR CR
BEAVER CR
BEAVER CR
BELMONT CR
BELMONT CR
BERTHA CR
BLACKFOOT R
BLACKFOOT R
BLACKFOOT R
BLACKFOOT R
BLACKFOOT R
BLACKFOOT R
BLACKFOOT R
BLACKFOOT R

BLACKFOOT R

BLACKFOOT R, E FK, N

BLACKFOOT R, N FK

MOUTH

BARTLETT CR

TOMS GULCH

MOUTH

ARRASTRA CR, N FK

MOUTH

KEEP COOL CR

THEODORE CR

MOUTH

BURNT FK

MOUTH

JOHNSON GULCH

WEST TWIN CR

EAST TWIN CR

BEAR CR

UNION CR

GOLD CR

BELMONT CR

ELK CR

CLEARWATER R

COTTONWOOD CR

CHAMBERLAIN CR

MONTURE CR

WARREN CR

BLACKFOOT R, N FK

WALES CR

YOURNAME CR

NEVADA CR

ARRASTRA CR

WILLOW CR

BEAVER CR

POORMAN CR

SEVEN UP PETE CR

LANDERS FK

HOGUM CR

UNNAMED

ALICE CR

WILLOW CR

COOOTTE CR

MOUTH

MINERAL CR

MOUTH

KLEINSCHMIDT CR

ROCK CR

LOST CR

LAKE CR

BLACKFOOT R, DRY FK

BARTLETT CR 04400.00

TOMS GULCH 04401.00

HEADWATERS 04500.00
ARRASTRA CR, N FK 05700.00

HEADWATERS 05701.00

HEADWATERS 13400.00

THEODORE CR 05601.00

HEADWATERS 05602.00

BURNT FK 12500.00

HEADWATERS 12501.00
HEADWATERS

JOHNSON GULCH 00100.00

WEST TWIN CR 00101.00

EAST TWIN CR 00102.00

BEAR CR 00103.00

UNION CR 00104.00

GOLD CR 00300.00

BELMONT CR 00400.00

ELK CR 00500.00

CLEARWATER R 00700.00

COTTONWOOD CR 00800.00

CHAMBERLAIN CR 00900.00

MONTURE CR 01100.00

WARREN CR 01200.00

BLACKFOOT R, N FK 01300.00

WALES CR 01400.00

YOURNAME CR 01600.00

NEVADA CR 01601.00

ARRASTRA CR 02800.00

WILLOW CR 03000.00

BEAVER CR 03200.00

POORMAN CR 03400.00

SEVEN UP PETE CR 03800.00

LANDERS FK 03801.00

HOGUM CR 03900.00

UNNAMED 03901.00

ALICE CR 04000.00

WILLOW CR 04200.00

COOOTTE CR 04300.00

HEADWATERS 04301.00

MINERAL CR 06000.00

MEADOW CR 06200.00

KLEINSCHMIDT CR 05800.00

ROCK CR 05800.13

LOST CR 05801.00

LAKE CR 05802.00

BLACKFOOT R, DRY FK 05803.00

BLACKFORK R, E FK, N 05900.00

E
E

E
E
E
E

V
R
R
R
R
R
R
R
E
E
R
R
R
R
R
R

■E
E
U
U
V
V
V
V

E
E
E
E

E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
B
B
E
E
B
B
B
B

A
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
N
N
A
A
A
A
A
A

7
8

8
8
8
8
8
8
8
8
8
8
8
8
8
8
10
10
10
10
10
10
10

10
10
10
10
10
10

8
8
6
6
6
6

BLACKFOOT R, N FK

BLACKFORK R, E FK. N

COONEY CR

06500.00

BLACKFOOT R, N FIC

COONEY CR

HEADWATERS

06700.00

BLANCHARD CR

MOUTH

HEADWATERS

12400.00

BOLES CR

MOUTH

HEADWATERS

12200.00

CAMP CR

L INEZ

HEADWATERS

14101.00

CHAMBERLAIN CR

MOUTH

CHAMBERLAIN CR, E FK 01000.00

CHAMBERLAIN CR

CHAMBERLAIN CR, E FK

CHAMBERLAIN CR, W FK 01001.00

CHAMBERLAIN CR

CHAMBERLAIN CR, W FK

HEADWATERS

01002.00

CLEARWATER R

SALMON L

OWL CR

09000.00

CLEARWATER R

OWL CR

MORRELL CR

09100.00

CLEARWATER R

MORRELL CR

SEELEY L

09700.00

CLEARWATER R

SEELEY L

SEELEY CR

09800.00

CLEARWATER R

SEELEY L

CLEARWATER R, W FK

10100.00

CLEARWATER R

CLEARWATER R, W FK

L INEZ

10200.00

CLEARWATER R

L INEZ

L ALVA

10600.00

CLEARWATER R

L ALVA

COLT CR

11000.00

CLEARWATER R

COLT CR

CLEARWATER R, E FK

11001.00

CLEARWATER R

CLEARWATER R, E FK

HEADWATERS

11002.00

CLEARWATER R, E FK

MOUTH

HEADWATERS

13800.00

CLEARWATER R, W FK

MOUTH

MARSHALL CR

11100.00

CLEARWATER R, W FK

MARSHALL CR

HEADWATERS

11200.00

COLT CR

MOUTH

HEADWATERS

13900.00

COPPER CR

MOUTH

HEADWATERS

05400.00

COTTONWOOD CR

MOUTH

WET COTTONWOOD CR

02000.00

COTTONWOOD CR

MOUTH

SHANLEY CR

08100.00

COTTONWOOD CR

SHANLEY CR

LITTLE SHANLEY CR

08300.00

COTTONWOOD CR

LITTLE SHANLEY CR

HEADWATERS

08301.00

DAISY CR

MOUTH

HEADWATERS

14800.00

DEER CR

SEELEY L

HEADWATERS

11500.00

DUNHAM CR

MOUTH

LODGEPOLE CR

08000.00

DUNHAM CR

LODGEPOLE CR

HEADWATERS

08001.00

EAST TWIN CR

MOUTH

HEADWATERS

13300.00

FINLEY CR

MOUTH

HEADWATERS

14000.00

GOLD CR

MOUTH

GOLD CR, W FK

12600.00

GOLD CR

GOLD CR, W FK

UNNAMED

12700.00

GOLD CR

UNNAMED

HEADWATERS

12701.00

GOLD CR, W FK

MOUTH

DAISY CR

12800.00

GOLD CR, W FK

DAISY CR

HEADWATERS

12801.00

JOHNSON GULCH

MOUTH

HEADWATERS

13100.00

LANDERS FK

MOUTH

COPPER CR

04800.00

LANDERS FK

COPPER CR

FALLS CR

04900.00

MARSHALL CR

MARSHALL L

HEADWATERS

11301.00

MONTURE CR

DUNHAM CR

FALLS CR

07900.00

MONTURE CR

FALLS CR

HEADWATERS

07901.00

MORRELL CR

MOUTH

TRAIL CR

09200.00

MORRELL CR

TRAIL CR

HEADWATERS

09600.00

NEVADA CR

MOUTH

MCELWAIN CR

01700.00

NEVADA CR

MCELWAIN CR

DOUGLAS CR

01701.00

NEVADA CR

DOUGLAS CR

NEVADA SPRING CR

02100.00

NEVADA CR

NEVADA SPRING CR

NEVADA L

02101.00

OWL CR

MOUTH

PLACID L

11600.00

PLACID CR

PLACID L

BOLES CR

12000.00

PLACID CR

BOLES CR

FINLEY CR

12100.00

PLACID CR

FINLEY CR

PLACID CR. N FK

12101.00

POORMAN CR

MOUTH

GRANT I ER SPRING CR

03500.00

POORMAN CR

GRANT I ER SPRING CR

FIELDS GULCH

03501.00

POORMAN CR

FIELDS GULCH

HEADWATERS

03600.00

TRAIL CR

MOUTH

BLIND CANYON CR

09300.00

UHLER CR

MOUTH

HEADWATERS

E R

Lakes

Lake Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics Habitat Risk
Rating Rating

CANYON L
L INEZ
RAINY L

MraiTH

NON TRANSPORT REACH

R
10400.00 Z

A
A
A

E M
B N
B N

STATUS OF BULL TROUT IN MONTANA
Middle Clark Fork #17010204

Stream Name

Lower Boundary

Upper Boundary

Streams
RRN Abundance Use

Genetics Habitat Risk
Rating Rating

BEESKOVE CR

MOUTH

HEADWATERS

13600.00

BIG CR

MOUTH

BIG CR, E FK

01900.00

BIG CR

BIG CR, E FK

BIG CR, M FK

02000.00

CACHE CR

MOUTH

MONTANA CR

05500.00

CACHE CR

MONTANA CR

WHITE CR

05700.00

CACHE CR

WHITE CR

IRISH CR

05701.00

CACHE CR

IRISH CR

HEADWATERS

05702.00

CEDAR CR

MOUTH

OREGON GULCH

03700.00

CEDAR CR

OREGON GULCH

HEADWATERS

04100.00

CLARK FK R

FLATHEAD R

SIEGAL CR

00100.00

CLARK FK R

SIEGAL CR

CASCADE CR

00200.00

CLARK FK R

CASCADE CR

TAMARACK CR

00201 .00

CLARK FK R

TAMARACK CR

MAYO GULCH

00400.00

CLARK FK R

MAYO GULCH

SAINT REGIS R

00401 .00

CLARK FK R

SAINT REGIS R

SLOWEY CR

02800.00

CLARK FK R

SLOUEY CR

DRY CR

02900.00

CLARK FK R

DRY CR

PARDEE CR

03300.00

CLARK FK R

PARDEE CR

FLAT CR

03400.00

CLARK FK R

FLAT CR

JOHNSON CR

03500.00

CLARK FK R

JOHNSON CR

CEDAR CR

03600.00

CLARK FK R

CEDAR CR

TROUT CR

04200.00

CLARK FK R

TROUT CR

FIRST CR

04400.00

CLARK FK R

FIRST CR

SECOND CR

04500.00

CLARK FK R

SECOND CR

EDDY CR

04600.00

CLARK FK R

EDDY CR

DEEP CR

04600.13

CLARK FK R

DEEP CR

MEADOW CR

04601.00

CLARK FK R

MEADOW CR

NEMOTE CR

04602.00

CLARK FK R

NEMOTE CR

QUARTZ CR

04700.00

CLARK FK R

QUARTZ CR

ROCK CR

04700.13

CLARK FK R

ROCK CR

FISH CR

04701.00

CLARK FK R

FISH CR

PETTY CR

05900.00

CLARK FK R

PETTY CR

NINEMILE CR

06300.00

CLARK FK R

NINEMILE CR

SIXMILE CR

06400.00

CLARK FK R

SIXMILE CR

ROMAN CR

06500.00

CLARK FK R

ROMAN CR

ALBERT CR

06501.00

CLARK FK R

ALBERT CR

ROCK CR

06700.00

CLARK FK R

ROCK CR

DEEP CR

06701.00

CLARK FK R

DEEP CR

BUTLER IRRIGATION

DI 06900.00

CLARK FK R

BUTLER IRRIGATION DI

BITTERROOT R

07000.00

CLARK FK R

BITTERROOT R

GRANT CR

07100.00

CLARK FK R

GRANT CR

RATTLESNAKE CR

07200.00

CLARK FK R

RATTLESNAKE CR

MARSHALL CR

07300.00

CLARK FK R

MARSHALL CR

BLACKFOOT R

07301.00

DEEP CR

MOUTH

GILMAN CR

06800.00

DEEP CR

GILMAN CR

HEADWATERS

06801.00

DEER CR

MOUTH

CRONIE CR

02200.00

stream Name

Louer Boundary

STATUS OF BULL TROUT IN MONTANA
Middle Clark Fork #17010204

Upper Boundary

Streams

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

DRY CR

EAST TWIN CR
FISH CR
FISH CR
FISH CR, N FK
FISH CR, N FK
FISH CR, S FK
FISH CR, S FK
FISH CR, S FK
FISH CR, W FK
FISH CR, U FK
FISH CR, U FK
FISH CR, U FK
FRASER CR
LAKE CR

LITTLE JOE CR, S FK
LOST CR
MONTANA CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
NINEMILE CR
PETTY CR
PETTY CR
PETTY CR
PETTY CR
PETTY CR
PETTY CR
PILCHER CR
PORCUPINE CR
RATTLESNAKE CR
RATTLESNAKE CR
RATTLESNAKE CR

DRY CR, DRY FK

U TWIN CR

MOUTH

FISH CR, S FK

MOUTH

STRAIGHT CR

MOUTH

THOMPSON CR

SURVEYORS CR

MOUTH

CEDAR LOG CR

INDIAN CR

FISH CR, U FK, TRIB

MOUTH

STONY CR

BUTTER CR

CEDAR CR

KENNEDY CR

FIRE CR

MCCORMICK CR

JOSEPHINE CR

MARION CR

BIRD CR

LITTLE BLUE CR

BIG BLUE CR

CAMP CR

SOLDIER CR

BURNT FK CR

BEECHER CR

ST. LOUIS CR

MOUTH

PETTY CR, W FK

EDS CR

GUS CR

PRINTERS CR

BILL CR

MOUTH

MT WATER CO DAM

SPRING GULCH

TORINO CR

HEADWATERS

FISH CR, S FK

FISH CR, N FK

STRAIGHT CR

CRATER CR

THOMPSON CR

SURVEYORS CR

CACHE CR

CEDAR LOG CR

INDIAN CR

FISH CR, W FK, TRIB

HEADWATERS

STONY CR

BUTTER CR

CEDAR CR

KENNEDY CR

FIRE CR

MCCORMICK CR

JOSEPHINE CR

MARION CR

BIRD CR

LITTLE BLUE CR

BIG BLUE CR

CAMP CR

SOLDIER CR

BURNT FK CR

BEECHER CR

ST. LOUIS CR

DEVILS CR

PETTY CR, W FK

EDS CR

GUS CR

PRINTERS CR

BILL CR

PETTY CR, S FK

HEADWATERS

MT WATER CO DAM

SPRING GULCH

FRASER CR

03100.00

10801.00

04800.00

04900.00

05000.00

05001 .00

05400.00

05401.00

05402.00

05100.00

05200.00

05201.00

05202.00

13800.00

13400.00

02700.00

03900.00

05600.00

08200.00

08400.00

08600.00

08700.00

08701.00

08702.00

08900.00

09100.00

09300.00

09301.00

09302.00

09500.00

09501 .00

09502.00

09503.00

09504.00

09505.00

06000.00

06001.00

06002.00

06200.00

06201.00

06202.00

13700.00

13200.00

07400.00

07401.00

P
P
P
R
R
R
R
N

7
7
8
8
7
7
7
8
8
8
8
9
9
9
7
11

12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12

10
10
8

STATUS OF BULL TROUT IN MONTANA
Middle Clark Fork #17010204

Stream Name

Lower Boundary

Upper Boundary

Streams
RRN Abundance Use

Genetics Habitat Risk
Rating Rating

RATTLESNAKE CR

FRASER CR

PILCHER CR

07402.00

RATTLESNAKE CR

PILCHER CR

BEESKOVE CR

07403.00

RATTLESNAKE CR

BEESKOVE CR

RATTLESNAKE CR, E

FK 07404.00

RATTLESNAKE CR

RATTLESNAKE CR, E FK

HIGH FALLS CR

07405.00

RATTLESNAKE CR

HIGH FALLS CR

PORCUPINE CR

07406.00

RATTLESNAKE CR

POROJPINE CR

LAKE CR

07407.00

RATTLESNAKE CR

LAKE CR

WRANGLE CR

07408.00

RATTLESNAKE CR

WRANGLE CR

HEADWATERS

13300.00

RATTLESNAKE CR, E FK

MOUTH

HEADWATERS

13100.00

SAINT REGIS R

MOUTH

LITTLE JOE CR

00500.00

SAINT REGIS R

LITTLE JOE CR

TWOMILE CR

00600.00

SAINT REGIS R

TWOMILE CR

WARD CR

00700.00

SAINT REGIS R

WARD CR

HENDERSON CR

00800.00

SAINT REGIS R

HENDERSON CR

TWELVEMILE CR

00801 .00

SAINT REGIS R

TWELVEMILE CR

MAYO CR

01000.00

SAINT REGIS R

MAYO CR

EAST TWIN CR

01000.13

SAINT REGIS R

EAST TWIN CR

DEER CR

01001.00

SAINT REGIS R

DEER CR

BIG CR

01100.00

SAINT REGIS R

BIG CR

SAVENAC CR

01200.00

SAINT REGIS R

SAVENAC CR

TIMBER CR

01400.00

SAINT REGIS R

TIMBER CR

MCMANUS CR

01401.00

SAINT REGIS R

HCMANUS CR

SILVER CR

01402.00

SAINT REGIS R

SILVER CR

PACKER CR

01500.00

SAINT REGIS R

PACKER CR

RANDOLPH CR

01700.00

SAINT REGIS R

RANDOLPH CR

RAINY CR

01701 .00

SAINT REGIS R

RAINY CR

HEADWATERS

01702.00

SIXMILE CR

MOUTH

SIXMILE CR, TRIB

B 08100.00

SIXMILE CR

SIXMILE CR, TRIB B

SIXMILE CR, TRIB

A 08101.00

SIXMILE CR

SIXMILE CR, TRIB A

HEADWATERS

08102.00

SPRING GULCH

MOUTH

HEADWATERS

13900.00

STRAIGHT CR

MOUTH

HEADWATERS

17800.00

SURVEYORS CR

MOUTH

HEADWATERS

17900.00

TAMARACK CR

MOUTH

TAMARACK CR, DRY

FK 00300.00

TROUT CR

MOUTH

WINDFALL CR

04300.00

TROUT CR

WINDFALL CR

TROUT CR, N FK

04301.00

TROUT CR. S FK

MOUTH

HEADWATERS

04302.00

TUELVEMILE CR

MOUTH

MIDDLE ROCK CR

00900.00

TUELVEMILE CR

MIDDLE ROCK CR

FLAT ROCK CR

00901.00

TWELVEMILE CR

FLAT ROCK CR

MINERAL MOUNTAIN

CR 00902.00

TWELVEMILE CR

MINERAL MOUNTAIN CR

TRAPPER CABIN CR

00903.00

TUELVEMILE CR

TRAPPER CABIN CR

HEADWATERS

00904.00

WARD CR

MOUTH

HEADWATERS

02300.00

WHITE CR

MOUTH

WHITE CR, S FK

12400.00

WHITE CR

WHITE CR, S FK

HEADWATERS

12401.00

WRANGLE CR

MOUTH

HEADWATERS

07409.00

STATUS OF BULL TROUT IN MONTANA
Bitterroot Drainage #17010205

Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat Risk

Rating

BAKER CR

MOUTH

HEADWATERS

15700.00

BASS CR

MOUTH

NATIONAL FOREST

02100.00

BASS CR

MOUTH

NATIONAL FOREST

02100.00

BEAR CR

MOUTH

BEAR CR. N FK

03000.00

BEAVER CR

MOUTH

HEADWATERS

19800.00

BERTIE LORD CR

MOUTH

HEADWATERS

11700.00

BIG CR

MOUTH

NATIONAL FOREST

02600.00

BIG CR

NATIONAL FOREST

HEADWATERS

02600.00

BITTERROOT R

MOUTH

O'BRIEN CR

00100.00

BITTERROOT R

O'BRIEN CR

HAYES CR

00101.00

BITTERROOT R

HAYES CR

MILLER CR

00102.00

BITTERROOT R

MILLER CR

LOLO CR

00200.00

BITTERROOT R

LOLO CR

SQUAW CR

OUOO.OO

BITTERROOT R

SQUAW CR

EIGHTMILE CR

01600.00

BITTERROOT R

EIGHTMILE CR

SWEENEY CR

01700.00

BITTERROOT R

SWEENEY CR

THREEMILE CR

01701.00

BITTERROOT R

THREEMILE CR

BASS CR

02200.00

BITTERROOT R

BASS CR

N BURNT FK CR

02300.00

BITTERROOT R

N BURNT FK CR

KOOTENAI CR

02301 .00

BITTERROOT R

KOOTENAI CR

BIG CR

02500.00

BITTERROOT R

BIG CR

SWEATHOUSE CR

02700.00

BITTERROOT R

SWEATHOUSE CR

BEAR CR

02900.00

BITTERROOT R

BEAR CR

FRED BURR CR

03300.00

BITTERROOT R

FRED BURR CR

WILLOW CR

03900.00

BITTERROOT R

WILLOW CR

BLODGETT CR

04100.00

BITTERROOT R

BLODGETT CR

CANYON CR

04200.00

BITTERROOT R

CANYON CR

SAWTOOTH CR

04201.00

BITTERROOT R

SAWTOOTH CR

ROARING LION CR

04400.00

BITTERROOT R

ROARING LION CR

SKALKAHO CR

04600.00

BITTERROOT R

SKALKAHO CR

SLEEPING CHILD CR

04700.00

BITTERROOT R

SLEEPING CHILD CR

LOST HORSE CR

04800.00

BITTERROOT R

LOST HORSE CR

LICK CR

05400.00

BITTERROOT R

LICK CR

ROCK CR

05401.00

BITTERROOT R

ROCK CR

TIN CUP CR

06000.00

BITTERROOT R

TIN CUP CR

CHAFFIN CR

06200.00

BITTERROOT R

CHAFFIN CR

RYE CR

06400.00

BITTERROOT R

RYE CR

BITTERROOT R, E FK

06500.00

BITTERROOT R,

E F<

MOUTH

LAIRD CR

09600.00

BITTERROOT R,

E FK

LAIRD CR

WARM SPRINGS CR

09601.00

BITTERROOT R,

E FK

WARM SPRINGS CR

CAMERON CR

09800.00

BITTERROOT R,

E FK

CAMERON CR

CAMP CR

09900.00

BITTERROOT R,

E FK

CAMP CR

REIMEL CR

10100.00

BITTERROOT R,

E FK

REIMEL CR

TOLAN CR

10300.00

BITTERROOT R,

E FK

TOLAN CR

MINK CR

10500.00

BITTERROOT R,

E FK

MINK CR

GUIDE CR

10501.00

BITTERROOT R,

E FK

GUIDE CR

BERTIE LORD CR

10502.00

STATUS OF BULL TROUT IN MOMTAMA
Bitterroot Drainage #17010205

Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance

Use

Genetics
Rating

Ht^ltat Risk
Rating

BITTERROOT R, E FK

BERTIE LORD CR

MFAOOW CR

10600.00

9
9
9
9
9
9
9
9
9
9
5
5
5

BITTERROOT R, E FK

MEADOW CR

MOOSF CR

11000.00

BITTERROOT R, E FK

MOOSE CR

BUCK CR

11100.00

B
B

BITTERROOT R, E FK

BUCK CR

HEADWATERS

11300.00

BITTERROOT R. NEZ PE

MOUTH

NELSON CR

07400.00

B
B
B
B
B

BITTERROOT R, NEZ PE

NELSON CR

SCO A SPRINGS CR

07401 .00

BITTERROOT R, NEZ PE

SODA SPRINGS CR

FLAT CR

07402.00

BITTERROOT R, NEZ PE

FLAT CR

WATCH TOWER CR

07403.00

BITTERROOT R, NEZ PE

WATCH TOWER CR

SHEEPHEAD CR

07600.00

BITTERROOT R, NEZ PE

SHEEPHEAD CR

HEADWATERS

07800.00

BITTERROOT R, W FK

MOUTH

TRAPPER CR

06600.00

BITTERROOT R, U FK

TRAPPER CR

BAKER CR

07000.00

BITTERROOT R, W FK

BAKER CR

PIQUETT CR

07001.00

BITTERROOT R, W FK

PIQUETT CR

LLOYD CR

07100.00

n
1 1

BITTERROOT R, U FK

LLOYD CR

LAVENE CR

07101.00

M
11

BITTERROOT R. U FK

LAVENE CR

BOULDER CR

07102.00

C
C

1 1
11

BITTERROOT R, U FK

BOULDER CR

BITTERROOT R, NEZ

PE 07300.00

n
11

BITTERROOT R, W FK

BITTERROOT R, NEZ PE

BEAVERTAIL CR

07900.00

1 1
1 1

BITTERROOT R, U FK

BEAVERTAIL CR

PAINTED ROCKS L

07901.00

1 1

BITTERROOT R, W FK

PAINTED ROCKS L

OVERWHICH CR

08600.00

BITTERROOT R, U FK

OVERWHICH CR

COAL CR

08700.00

BITTERROOT R, W FK

COAL CR

WEST CR

08700.13

BITTERROOT R, W FK

WEST CR

HUGHES CR

08701.00

BITTERROOT R, W FK

HUGHES CR

CHICKEN CR

08800.00

BITTERROOT R, W FK

CHICKEN CR

DEER CR

08801.00

BITTERROOT R. W FK

DEER CR

WOODS CR

09000.00

BITTERROOT R, W FK

WOODS CR

BEAVER CR

09001 .00

BITTERROOT R, W FK

BEAVER CR

SHEEP CR

09002.00

BITTERROOT R, U FK

SHEEP CR

RUNS OUT OF STATE

09003.00

BLODGETT CR

MOUTH

HEADWATERS

04000.00

BLUE JOINT CR

PAINTED ROCKS L

LITTLE BLUE JOINT

CR 08400.00

BLUE JOINT CR

LITTLE BLUE JOINT CR

JACK-THE-RIPPER CR 08401.00

BLUE JOINT CR

JACK-THE-RIPPER CR

TWO BUCK CR

08402.00

BLUE JOINT CR

TWO BUCK CR

BLUE JOINT CR, LAKE 08403.00

BLUE JOINT CR

BLUE JOINT CR, LAKE

HEADWATERS

08404.00

BOULDER CR

MOUTH

ONE CR

07200.00

BOULDER CR

ONE CR

HEADWATERS

07201.00

BUCK CR

MOUTH

HEADWATERS

11200.00

BURNT FK BITTERROOT

S BURNT FK CR

GOID CR

13400.50

BURNT FK BITTERROOT

GOLD CR

HEADWATERS

13401.00

CAHERON CR

MOUTH

CAMERON CR, N FK

11800.00

CAMERON CR

CAMERON CR, N FK

HEADWATERS

11801.00

CAMP CR

MOUTH

WAUGH CR

10000.00

CAMP CR

WAUGH CR

CAMP CR, W FK

10000.13

CANYON CR

MOUTH

NATIONAL FOREST

15300.00

CANYON CR

NATIONAL FOREST

HEADWATERS

15300.00

STATUS OF BULL TROUT IN MONTANA
Bitterroot Drainage #17010205

Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use Genetics

Habitat Risk

Rating

— .

CARLTON CR

MOUTH

NATIONAL FOREST

01800.00

E L

CARLTON CR

MOUTH

NATIONAL FOREST

01800.00

E L

CHAFFIN CR

MOUTH

NATIONAL FOREST

06100.00

U L

CHAFF IN CR

NATIONAL FOREST

HEADWATERS

06100.00

U L

DALY CR

MOUTH

UNNAMED

12700.00

A L

DALY CR

UNNAMED

HEADWATERS

12701.00

A L

DEER CR

MOUTH

HEADWATERS

08900.00

U R

DIVIDE CR

MOUTH

HEADWATERS

12400.00

C L

EIGHTMILE CR

EIGHTMILE CR, N FK

HEADWATERS

13801.00

Z Z

FRED BURR CR

MOUTH

MILL CR

03400.00

C L

FRED BURR CR

MOUTH

NATIONAL FOREST

03500.00

C L

FRED BURR CR

NATIONAL FOREST

HEADWATERS

03500.00

C L

GIRD CR

MOUTH

COW CR

12900.00

U L

GIRD CR

COW CR

HEADWATERS

13000.00

U I

GOLD CR

MOUTH

HEADWATERS

20900.00

C I

GRANITE CR

MOUTH

HEADWATERS

00700.00

R J

HUGHES CR

MOUTH

MINE CR

09100.00

U I

9
9

HUGHES CR

MINE CR

KRAFT GULCH

09300.00

U I

HUGHES CR

KRAFT GULCH

HEADWATERS

09301.00

U 1

KOOTENAI CR

MOUTH

NATIONAL FOREST

02400.00

E 1

KOOTENAI CR

MOUTH

NATIONAL FOREST

02400.00

E 1

LITTLE BOULDER CR

PAINTED ROCKS L

HEADWATERS

16900.00

N 1

* E

LITTLE ROCK

L COMO

HEADWATERS

15501.00

I B

LITTLE WEST

FORK CR

MOUTH

HEADWATERS

16400.00

L B

LOLO CR

MOUTH

MORMON CR

00300.00

M E

LOLO CR

MORMON CR

LOLO CR, S FK

00301.00

M E

LOLO CR

LOLO CR, S FK

BEAR CR

00400.00

M E

LOLO CR

BEAR CR

GRAVE CR

00401.00

N E

LOLO CR

GRAVE CR

HOWARD CR

00402.00

N E

LOLO CR

HOWARD CR

GRANITE CR

00600.00

N E

LOLO CR

GRANITE CR

LOLO CR, E FK

00800.00

L E

LOLO CR, S

MOUTH

BUTTE CR, W FK

01100.00

R H

LOLO CR, S

BUTTE CR, W FK

DICK CR

01300.00

R H

LOLO CR, S

DICK CR

HEADWATERS

01301.00

R H

LOST HORSE

MOUTH

S LOST HORSE CR

04900.00

L E

LOST HORSE

S LOST HORSE CR

N LOST HORSE CR

05000.00

L E

LOST HORSE

N LOST HORSE CR

HEADWATERS

05200.00

L E

MARTIN CR

MOUTH

BUSH CR

11600.00

L E

MARTIN CR

BUSH CR

HEADWATERS

11601.00

L B

MEADOW CR

MOUTH

SWIFT CR

10700.00

L '

MEADOW CR

SWIFT CR

HEADWATERS

10800.00

L 1

MILL CR

MOUTH

SHEAFMAN CR

03600.00

L E

MILL CR

SHEAFMAN CR

HEADWATERS

03800.00

L E

MILLER CR

MOUTH

DAGERT CR

13900.00

N E

MILLER CR

DAGERT CR

LITTLE PARK CR

13900.13

N C

MILLER CR

LITTLE PARK CR

PARK CR

13901 .00

N C

STATUS OF BULL TROUT IN HONTANA
Bitterroot Drainage #17010205

Streams

stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat

Risk

Rating

HILLER CR

PARK CR

PLANT CR

13902.00

N N

HILLER CR

PLANT CR

HOLLOMAN CR

13903.00

N N

HILLER CR

HOLLOMAN CR

HEADWATERS

13904.00

N N

MOOSE CR

MOUTH

MARTIN CR

11400.00

C L

MOOSE CR

MARTIN CR

HEADWATERS

11500.00

C L

NELSON CR

MOUTH

HEADWATERS

16100.00

Z L

ONEHORSE CR

MOUTH

HEADWATERS

01900.00

Z L

OVERUHICH CR

MOUTH

TROUT CR

09400.00

R L

11
11

PIQUETT CR

MOUTH

HEADWATERS

09500.00

R L

RE I MEL CR

MOUTH

HEADWATERS

10200.00

R L

ROARING LION CR

MOUTH

HEADWATERS

04500.00

E L

ROCK CR

L COMO

HEADWATERS

05900.00

Z z

RYE CR

MOUTH

RYE CR, N FK

11900.00

N N

RYE CR

RYE CR, N FK

HEADWATERS

11901.00

R L

RYE CR, N FK

MOUTH

HEADWATERS

20600.00

N N

S LOST HORSE CR

MOUTH

HEADWATERS

05300.00

E L

SAWTOOTH CR

MOUTH

NATIONAL FOREST

04300.00

E L

SAWTOOTH CR

NATIONAL FOREST

HEADWATERS

04300.00

E L

SHEAFMAN CR

MOUTH

NATIONAL FOREST

03700.00

Z L

SHEAFMAN CR

NATIONAL FOREST

HEADWATERS

03700.00

Z L

SHEEPHEAD CR

MOUTH

HEADWATERS

07700.00

Z L

SKALKAHO CR

MOUTH

NATIONAL FOREST

12500.00

R L

SKALKAHO CR

NATIONAL FOREST

DALY CR

12500.00

R L

SKALKAHO CR

DALY CR

UNNAMED

12600.00

C L

SKALKAHO CR

UNNAMED

HEADWATERS

12601.00

C L

SLATE CR

PAINTED ROCKS L

ANGLE CR

17300.00

C L

SLATE CR

ANGLE CR

HEADWATERS

17400.00

C L

SLEEPING CHILD CR

MOUTH

LITTLE SLEEPING CHIL 12000.00

R L

12
12

SLEEPING CHILD CR

LITTLE SLEEPING CHIL

TWO BEAR CR

12200.00

R L

SLEEPING CHILD CR

TWO BEAR CR

DIVIDE CR

12201.00

C L

SLEEPING CHILD CR

DIVIDE CR

HEADWATERS

20700.00

C L

SODA SPRINGS CR

LITTLE WEST FORK CR

HEADWATERS

16201.00

Z z

SWEATHOUSE CR

MOUTH

NATIONAL FOREST

02800.00

A L

SWEAT HOUSE CR

MOUTH

NATIONAL FOREST

02800.00

A L

SWEENEY CR

MOUTH

NATIONAL FOREST

02000.00

U L

SWEENEY CR

NATIONAL FOREST

HEADWATERS

02000.00

U L

SWEENEY CR

LARRY CR

SWEENEY CR, N FK

02000.13

U L

THREEMILE CR

MOUTH

BITTERROOT GAME RANG 13700.00

N N

THREEMILE CR

BITTERROOT GAME RANG

HEADWATERS

13700.00

N N

TIN CUP CR

MOUTH

HEADWATERS

06100.00

C L

TOLAN CR

MOUTH

STONE CR

10400.00

U L

TRAPPER CR

MOUTH

TRAPPER CR, N FK

06700.00

Z R

TRAPPER CR

TRAPPER CR, N FK

HEADWATERS

06900.00

Z R

TWO BEAR CR

MOUTH

HEADWATERS

12300.00

C R

TWO BUCK CR

MOUTH

UNNAMED

18100.00

C L

WARM SPRINGS CR

MOUTH

CRAZY CK

09700.00

U L

STATUS OF BULL TROUT IN MONTANA
Bitterroot Drainage #17010205

Streams

Stream Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics
Rating

Habitat Risic
Rating

WATCH TOWER CR
WILLOW CR
WOODS CR
WOODS CR
WOODS CR

MOUTH

GIRD CR

HOUTH

WOODS CR, N FK

WOODS CR, S FK

HEADWATERS
HEADWATERS
WOODS CR, N FK
WOODS CR, S FK
HEADWATERS

07500.00
13200.00
18900.00
18901.00
18902.00

u
u
u
u

L
L
L

E
E

H
H
H

A
C 10
C 10
C 10
C 10

Lakes

Lake Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

STATUS OF BULL TROUT IN MONTANA
North Fork Flathead #17010206
Streams

stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat Risk

Rating

BIG CR

MOUTH

LANGFORD CR

08100.00

BIG CR

LANGFORD CR

LOOKOUT CR

08101.00

BIG CR

LOOKOUT CR

ELELEHUM CR

08102.00

BIG CR

ELELEHUM CR

HALLOUAT CR

08103.00

BIG CR

HALLOWAT CR

SKOOKOLEEL CR

08300.00

BIG CR

SKOOKOLEEL CR

NICOLA CR

08301.00

BOWMAN CR

BOWMAN L

HEADWATERS

03300.00

COAL CR

MOUTH

CYCLONE CR

07400.00

COAL CR

CYCLONE CR

DEAD HORSE CR

07600.00

COAL CR

DEAD HORSE CR

COAL CR, S FK

07700.00

COAL CR

COAL CR, S FK

HAINES FK

07800.00

COAL CR

HAINES FK

HEADWATERS

07801 .00

COAL CR, S FK

MOUTH

MATHIAS CR

07900.00

COAL CR, S FK

MATH IAS CR

HEADWATERS

07901 .00

COLTS CR

MOUTH

HEADWATERS

09400.00

CYCLONE CR

MOUTH

CYCLONE L

07500.00

CYCLONE CR

CYCLONE L

HEADWATERS

07501 .00

DEPUY CR

MOUTH

HEADWATERS

11200.00

FLATHEAD R, N

MOUTH

CANYON CR

00100.00

FLATHEAD R, N

CANYON CR

DEEP CR

00200.00

FLATHEAD R. N

DEEP CR

BIG CR

00201.00

FLATHEAD R, N

BIG CR

CAMAS CR

00300.00

FLATHEAD R, N

CAMAS CR

ANACONDA CR

00700.00

FLATHEAD R, N

ANACONDA CR

LOGGING CR

00900.00

FLATHEAD R. N

LOGGING CR

COAL CR

01500.00

FLATHEAD R, N

COAL CR

QUARTZ CR

01600.00

FLATHEAD R, N

QUARTZ CR

HAY CR

n?6no.oo

FLATHEAD R, N

HAY CR

BOWMAN CR

02800.00

FLATHEAD R, N

BOWMAN CR

AKOKALA CR

03400.00

FLATHEAD R, N

AKOKALA CR

RED MEADOW CR

04000.00

FLATHEAD R, N

RED MEADOW CR

MOOSE CR

04100.00

FLATHEAD R, N

MOOSE CR

WHALE CR

04200.00

FLATHEAD R, N

WHALE CR

FORD CR

04300.00

FLATHEAD R, N

FORD CR

TEPEE CR

04301 .00

FLATHEAD R, N

TEPEE CR

KINTLA CR

04400.00

FLATHEAD R, N

KINTLA CR

TRAIL CR

05100.00

FLATHEAD R, N

TRAIL CR

STARVATION CR

05200.00

FLATHEAD R, N

STARVATION CR

KISHENEHN CR

05400.00

FLATHEAD R, N

KISHENEHN CR

SPRUCE CR

05600.00

FLATHEAD R, N

SPRUCE CR

SAGE CR

05800.00

FLATHEAD R, N

SAGE CR

COLTS CR

05801.00

FLATHEAD R, H

COLTS CR

HEADWATERS

05802.00

HALLOWAT CR

MOUTH

WERNER CR

08200.00

HALLOUAT CR

WERNER CR

KLETOMUS CR

08201.00

HALLOUAT CR

KLETOMUS CR

HEADWATERS

08202.00

HAY CR

UNNAMED

BRIDGE 1.2 MILE BELO 07201.00

HAY CR

BRIDGE 1.2 MI

HEADWATERS

07201.00

KINTLA CR

KINTLA L

HEADWATERS

04900.00

KLETONUS CR

MOUTH

MOOSE L

10500.00

LANGFORD CR

NOOTH

HEADWATERS

10400.00

LOGGING CR

LOGGING L

HEADWATERS

01400.00

LOOKOUT CR

MOUTH

HEADWATERS

10900.00

MATHIAS CR

MOUTH

HEADWATERS

10300.00

MCGINNIS CR

MOUTH

HEADWATERS

11000.00

MORAN CR

MOUTH

4.2 MILES ABOVE MOUT 07300.00

HORAN CR

MOUTH

4.2 MILES ABOVE

MOUT

07300.00

NICOLA CR

»K)UTH

HEADWATERS

10700.00

QUARTZ CR

LOWER QUARTZ L

QUARTZ L

02100.00

QUARTZ CR

QUARTZ L

HEADWATERS

02500.00

RED MEADOW CR

MOUTH

RED MEADOW CR, S

07100.00

RED MEADOW CR

RED MEADOW CR. S FK

LINK L FK

07101.00

RED MEADOW CR

LINK L FK

HEADWATERS

07102.00

SHORTY CR

MOUTH

SHORTY CR, S FK

06800.00

SHORTY CR, S FK

MOUTH

HEADWATERS

09700.00

STARVATION CR

MOUTH

HEADWATERS

05300.00

TRAIL CR

MaiTH

KETCHIKAN CR

05900.00

TRAIL CR

KETCHIKAN CR

THOMA CR

05901.00

WERNER CR

MOUTH

HEADWATERS

10600.00

WHALE CR

MOUTH

AKINKOKA CR

06500.00

WHALE CR

AKINKOKA CR

SHORTY CR

06600.00

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

AKOKALA L

ARROW L

BOWMAN L

MOUTH

CERULEAN L

FROZEN L

KINTLA L

MOUTH

LOGGING L

MOUTH

LOWER QUARTZ L

MOUTH

MIDDLE QUARTZ L

QUARTZ L

MOUTH

TROUT L

UPPER KINTLA L

MOUTH

NON_TRANSPORT REACH 03100.00

N0N_TRANSP0RT REACH 04700.00

NON_TRANSPORT REACH 01200.00

N0N_TRANSP0RT REACH 01900.00

NON.TRANSPORT REACH 02300.00

NON TRANSPORT REACH 05000.00

A
A
U
Z
A
C
A
A
C
Z

A
A
R
A
A
A
A
A
A
A
A
R

3
6

6
3
3
6

STATUS OF BULL TROUT IN HONTANA
Middle Fork Flathead #17010207
Streans

stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use Genetics

Habitat

Risk

Rating

ARGOSY CR

MOUTH

HEADWATERS

10000.00

U J

BASIN CR

MOUTH

HEADWATERS

04200.00

R J

BEAR CR

MOUTH

SILVER STAIRCASE CR

06000.00

1 E

BEAR CR

SILVER STAIRCASE CR

GIEFER CR

06001.00

1 E

BEAR CR

GIEFER CR

SKYLAND CR

06200.00

C /

k E

BEAR CR

SKYLAND CR

HEADWATERS

06201.00

C A E

BOUL CR

MOUTH

SCALP CR

04100.00

V (

: B

BOWL CR

SCALP CREEK

1.8 MI BELOW BASIN C 04101.00

: B

BOUL CR

1.8 MI BELOW BASIN C

BASIN CR

04101.00

Z B

BOUL CR

BASIN CR

HEADWATERS

04300.00

J B

CALBRICK CR

MOUTH

HEADWATERS

10100.00

J B

CHALLENGE CR

MOUTH

HEADWATERS

05601.00

i B

CHARLIE CR

MOUTH

UNNAMED

02600.00

J B

CHARLIE CR

UNNAMED

3.4 MI ABOVE MOUTH

02601.00

J B

CHARLIE CR

3.4 MI ABOVE MOUTH

HEADWATERS

02601.00

J B

CLACK CR

MOUTH

UNNAMED

03900.00

J B

COAL CR

MOUTH

PINCHOT CR

06600.00

P E

COAL CR

PINCHOT CREEK

.6 MI ABOVE FALLS

06700.00

J E

COAL CR

.6 MILES ABOVE FALLS

HEADWATERS

06700.00

J E

DEERLICK CR

MOUTH

MOCCASIN CR

08600.00

A E

DICKEY CR

MOUTH

HEADWATERS

01600.00

R B

DIRTY FACE CR

MOUTH

ELK CR

02400.00

J B

DODGE CR

MOUTH

HEADWATERS

11000.00

A B

DOLLY VAROEN CR

MOUTH

ARGOSY CR

03501 .00

J B

DOLLY VARDEN CR

ARGOSY CR

HEADWATERS

03502.00

J B

ELK CR

MOUTH

HEADWATERS

02401 .00

J B

FLATHEAD R, M

MOUTH

UNNAMED

00100.00

P B

FLATHEAD R, M

UNNAMED

MCDONALD CR

00200.00

P B

FLATHEAD R, M

MCDONALD CR

LINCOLN CR

00300.00

P B

FLATHEAD R, M

LINCOLN CR

DEERLICK CR

00400.00

P B

FLATHEAD R, M

DEERLICK CR

HARRISON CR

00401.00

P B

FLATHEAD R, M

HARRISON CR

NYACK CR

00500.00

P B

FLATHEAD R, M

NYACK CR

CRYSTAL CR

00600.00

P B

FLATHEAD R, M

CRYSTAL CR

COAL CR

00601.00

P B

FLATHEAD R, H

COAL CR

STANTON CR

00700.00

P B

FLATHEAD R, M

STANTON CR

TUNNEL CR

00900.00

P B

FLATHEAD R, H

TUNNEL CR

MUIR CR

01100.00

P B

FLATHEAD R, M

MUIR CR

PAOLA CR

01200.00

P B

FLATHEAD R, M

PAOLA CR

PARK CR

01400.00

P B

FLATHEAD R, H

PARK CR

DICKEY CR

01500.00

P B

FLATHEAD R, M

DICKEY CR

OLE CR

01700.00

P B

FLATHEAD R, M

OLE CR

ESSEX CR

01900.00

P B

FLATHEAD R, M

ESSEX CR

SHEEP CR

02000.00

P B

FLATHEAD R, M

SHEEP CR

BEAR CR

02200.00

P B

FLATHEAD R, H

BEAR CR

DIRTY FACE CR

02300.00

P B

FLATHEAD R, H

DIRTY FACE CR

CHARLIE CR

02500.00

P B

FLATHEAD R, M

CHARLIE CR

LONG CR

02700.00

P B

FLATHEAD R, M

LONG CR

TWENTYFIVE MILE CR

02900.00

P B

FUTHEAD R, M FK

FLATHEAD R, M FK

GATEWAY CR

GIEFER CR

GRANITE CR

LAKE CR

LINCOLN CR

LODGEPOLE CR

LOOGEPOLE CR

LONG CR

MCDONALD CR

MORRISON CR

MUIR CR

NYACK CR

OLE CR

PAOLA CR

PARK CR

PINCHOT CR

PUZZLE CR

SCHAFER CR

SHEEP CR

SKYLAND CR

STRAWBERRY CR

STRAWBERRY CR. E FK

TWENTYFIVE MILE CR

GRANITE CR

LAKE CR

MORRISON CR

SCHAFER CR

CALBRICK CR

COX CR

WINTER CR

CLACK CR

MOUTH

SHIN CR

2.3 MI ABOVE SHIN CR

MOUTH

UNNAMED

MOUTH

1.5 MI ABOVE MOUTH

MOUTH

WALTON CR

MOUTH

WHISTLER CR

MOUTH

BERGSICKER CR

CANYON MOUTH

MOUTH

MCDONALD L

WXJTH

LOOGEPOLE CR

UNNAMED

CRESCENT CR

PUZZLE CR

MOUTH

1ST TRIB FROM MOUTH

MOUTH

THOMPSON CR

MOUTH

UNNAMED

FIELDING CR

MOUTH

PAOLA CR RD CULVERT

MOUTH

UNNAMED

STRIPED ELK LK OUTLE

MOUTH

1.1 MI ABOVE MOUTH

MOUTH

DOLLY VARDEN CR

ROARING CR

MOUTH

BARRIERS

MOUTH

TRAIL CR

GATEWAY CR

STRAWBERRY CR, E FK

MOUTH

GRANITE CR

LAKE CR

MORRISON CR

SCHAFER CR

CALBRICK CR

COX CR

WINTER CR

CLACK CR

BOWL CR

SHIN CREEK

2.3 MI ABOVE SHIN CR

HEADWATERS

UNNAMED

CHALLENGE CR

1.5 MILES ABOVE MOUT

HEADWATERS

WALTON CR

HEADWATERS

WHISTLER CR

HEADWATERS

BERGSICKER CR

CANYON MOUTH ABOVE B

HEADWATERS

MCDONALD L

HEADWATERS

LODGEPOLE CR

UNNAMED

CRESCENT CR

PUZZLE CR

HEADWATERS

1ST TRIB FROM NORTH

HEADWATERS

THOMPSON CR

HEADWATERS

UNNAMED

FIELDING CR

HEADWATERS

PAOLA CR RD CULVERT

HEADWATERS

UNNAMED

STRIPED ELK LK OUTLE

STRIPED ELK LAKE OUT

1.1 MI ABOVE MOUTH

HEADWATERS

DOLLY VARDEN CR

ROARING CR

ROUGE CR

HEADWATERS

BARRIERS

HEADWATERS

TRAIL CR

GATEWAY CR

STRAWBERRY CR, E FK

HEADWATERS

03000.00

03100.00

03300.00

03400.00

03600.00

03601.00

03700.00

03800.00

04000.00

04900.00

06100.00

05600.00

05600.13

03200.00

07500.00

07501.00

05400.00

05401.00

02800.00

02801.00

07600.00

08200.00

05300.00

05500.00

05501.00

05501.13

10800.00

06500.00

07100.00

07200.00

06300.00

06300.13

11200.00

01300.00

06400.00

06400.13

06401.00

06800.00

05502.00

03500.00

09300.00

09301.00

02100.00

11100.00

11101.00

OUOO.OO

04800.00

05000.00

05001.00

10600.00

V
V
V
V
V
V
V
V
V

u
u
u
u

V
V
R
R
U
U
V
V
V
V
V
U

V
V
V
V

c
c
c

V
V
V
V

TRAIL CR

HOUTH

TRAIL CR, S FK

04500.00

V d

TRAIL CR

TRAIL CR, S FK

JEFF CR

04700.00

1 B

TRAIL CR

JEFF CREEK

HEADUATERS

04700.00

1 B

TWENTYFIVE MILE CR

HOUTH

MOOSE CR

0S7O0.0O

1 B

WALTON CR

MOUTH

1ST TRIBUTARY ON N A 11600.00

1 E

WALTON CR

1ST TRIB ON N

HEADUATERS

11600.00

1 E

WHISTLER CR

MOUTH

HEADWATERS

10700.00

1 B

Lake Name

Louer Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

HARRISON L
LOWER ISABEL L
MCDONALD L
UPPER ISABEL L

MOUTH

NON TRANSPCMT REACH 07800.00

STATUS OF BULL TROUT IN MONTANA
Flathead Lake #17010208

Streams

Stream Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics

Habitat

Risk

Rating

FLATHEAD R

FLATHEAD L

MILL CR

01200.00

FLATHEAD R

MILL CR

ASHLEY CR

OUOO.OO

FLATHEAD R

ASHLEY CR

STILLWATER R

01500.00

FLATHEAD R

STILLWATER R

FLATHEAD R, S

01600.00

FLATHEAD R

FLATHEAD R, S FK

ABBOT CR

01700.00

FLATHEAD R

ABBOT CR

FLATHEAD R, M

01701.00

TRUMAN CR

MOUTH

HEADWATERS

03000.00

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

FLATHEAD L

MOUTH

NON TRANSPORT REACH 00200.00

stream Name

Lower Boundary

STATUS OF BULL TROUT IM MONTANA
South Fork Flathead #17010209
Streams

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

BASIN CR

MOUTH

HEADWATERS

15500.00

U L

BIG SALMON CR

MOUTH

BIG SALMON L

07300.00

V J

BIG SALMON CR

BIG SALMON L

SPUD CR

07700.00

D J

BIG SALMON CR

SPUD CR

TANGO CR

07700.13

D J

BIG SALMON CR

TANGO CR

CATARACT CR

07701.00

D J

BIG SALMON CR

CATARACT CR

PENDANT CR

07900.00

D J

BUNKER CR

MOUTH

GORGE CR

04700.00

V J

BUNKER CR

GORGE CR

RAZZLE CR

04800.00

V J

BUNKER CR

RAZZLE CR

STRING CR

04801.00

V J

CAMP CR

MOUTH

HEADWATERS

15600.00

U L

CLARK CR

HUNGRY HORSE RES

TAYLOR CR

18R01.00

U F

CLARK CR

MOUTH

1.5 MILES ABOVE MOTH

18802.00

U F

CLARK CR

1.5 MI ABOVE MOUTH

HEADWATERS

18802.00

U F

CONNER CR

MOUTH

HEADWATERS

03300.00

U J

DANAHER CR

CAMP CR

BASIN CR

10501.00

DANAHER CR

BASIN CR

FOOLHEN CR

10502.00

DANAHER CR

FOOLHEN CR

RAPID CR

10700.00

DANAHER CR

RAPID CR

CALF CR

10800.00

1 E

DANAHER CR

CALF CR

BAR CR

10801.00

i E

DANAHER CR

BAR CR

LIMESTCME CR

10802.00

1 E

DANAHER CR

LIMESTONE CR

HEADWATERS

15300.00

1 E

DORIS CR

HUNGRY HORSE RES

HEADWATERS

18301.00

FLATHEAD R,

MOUTH

HUNGRY HORSE RES

00100.00

J B

FLATHEAD R,

HUNGRY HORSE RES

SOLDIER CR

03600.00

V 1

> B

FLATHEAD R,

SOLDIER CR

LOWER TWIN CR

03601.00

V 1

> B

FLATHEAD R,

LOWER TWIN CR

TWIN CR

03700.00

9 B

FLATHEAD R,

TWIN CR

TIN CR

03800.00

P B

FLATHEAD R,

TIN CR

SPOTTED BEAR R

03801.00

P B

FLATHEAD R,

SPOTTED BEAR R

ADDITION CR

03900.00

P B

FLATHEAD R,

ADDITION CR

JUNGLE CR

04300.00

? B

FLATHEAD R,

JUNGLE CR

HARRISON CR

04500.00

? B

FLATHEAD R,

HARRISON CR

LOST JACK CR

04600.00

? B

FLATHEAD R,

LOST JACK CR

BUNKER CR

04601.00

P B

FLATHEAD R,

BUNKER CR

MID CR

06200.00

P B

FLATHEAD R,

MID CR

SLICK CR

06300.00

P B

FLATHEAD R,

SLICK CR

BLACK BEAR CR

06500.00

P B

FLATHEAD R,

BLACK BEAR CR

HUNGRY CR

06600.00

P B

FLATHEAD R,

HUNGRY CR

LITTLE SALMON CR

06800.00

P B

FLATHEAD R,

LITTLE SALMON CR

BIG SALMON CR

07200.00

P B

FLATHEAD R,

BIG SALMON CR

WHITE R

08000.00

P B

FLATHEAD R,

WHITE R

HOLBROOK CR

08100.00

P B

FLATHEAD R,

HOLBROOK CR

BURNT CR

08300.00

P B

FLATHEAD R,

BURNT CR

BARTLETT CR

08301.00

P B

FLATHEAD R.

BARTLETT CR

GORDON CR

08500.00

P B

FLATHEAD R,

GORDON CR

DANAHER CR

09100.00

P B

GORDON CR

GABE CR

UNNAMED

08600.13

J B

GORDON CR

UNNAMED

SHAW CR

08601 .00

J B

GORDON CR

SHAW CR

. GEORGE CR

08800.00

J B

GORDON CR
GORGE CR
GORGE CR
HUNGRY HORSE CR
HUNGRY HORSE CR
LITTLE SALMON CR
LOWER TWIN CR
LOWER TWIN CR
MCINERNIE CR
MCINERNIE CR
QUINTONKON CR
SOLDIER CR
SPOTTED BEAR R
SPOTTED BEAR R
SPOTTED BEAR R
SPOTTED BEAR R
SPOTTED BEAR R

SPOTTED BEAR R

SULLIVAN CR

TIN CR

TWIN CR

WHEELER CR

WHITE R

WOUNDED BUCK CR

YOUNGS CR

GEORGE CR

MOUTH

STADIUM CR

HUNGRY HORSE RES

MARGARET CR

MOUTH

TANNER CR

MOUTH

1.3 MIL ABOVE MOUTH

MOUTH

BENT CR

SERGEANT CR

WHITCOMB CR

SILVERTIP CR

DEAN CR

BATTERY CR

QUINTONKON CR

BALL CR

BRANCH CR

CONNER CR

SLIDE CR

MOUTH

HUNGRY HORSE RES

MOUTH

WHITE R, S FK

NEEDLE FALLS

HUNGRY HORSE RES

WILDCAT CR

MOUTH
HAHN CR
BABCOCK CR

DOCTOR CR
STADIUM CR
INSPIRATION CR
MARGARET CR
TIGER CR
CHASM CR
TANNER CR
HEADWATERS
1.3 MILES ABOVE
HEADWATERS
POSY CR
HEADWATERS
BENT CR
SERGEANT CR
WHITCOMB CR
SILVERTIP CR
DEAN CR
SLIM CR
QUINTONKON CR
BALL CR
BRANCH CR
CONNER CR
SLIDE CR

HEADWATERS

TRAPPER CR

WHITE R, S FK

NEEDLE FALLS

SOURCE

WILDCAT CR

HEADWATERS

HAHN CR

BABCOCK CR

MARSHALL CR

08900.00
05300.00
05400.00
20201.00
20202.00
06900.00
12600.00
12601.00
MOUT 19801.00
19801.00
03100.00
14700.00
11800.00
11800.13
11801.00
11802.00
12000.00
12100.00
03000.00
03200.00
03201.00
03202.00
03400.00
03401.00
14800.00
12500.00
02700.00
11400.00
11401.00
11401.00
01600.00
01700.00
09200.00
09300.00
09700.00

B
B

B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B

N
N

A
B
B
B
B
C
C
A
B
N
N
N

10
6
9
9

6
7
6
6
6
6
6
6
6
6
6
6
7
6
7
7
7
7
8
8
6
7

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

BIG SALMON L MOUTH

HUNGRY HORSE RES MOUTH

NOH_TRANSPORT REACH 07500.00 D A B A 5

NON TRANSPORT REACH 00300.00 DA B A 5

stream Name

Lower Boundary

STATUS OF BULL TROUT IN HONTAMA
Stillwater Drainage #17010210

Streams

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

ANT ICE CR

LOGAN CR

STILLUATER R

STILLWATER R

STILLUATER R

STILLWATER R

STILLUATER R
STILLWATER R
STILLUATER R
STILLUATER R
STILLUATER R
STILLUATER R
STILLUATER R
STILLUATER R
STILLUATER R
STILLUATER R
STILLWATER R
STILLWATER R
SUNDAY CR
SUNDAY CR
SUNDAY CR
SUNDAY CR
SUNDAY CR
SUNDAY CR
SUNDAY CR
SWIFT CR
SUIFT CR
SWIFT CR
SUIFT CR, E FK
SWIFT CR, U FK
SUIFT CR, W FK
UHITEFISH R

MOUTH
MOUTH
GOOD CR
EVERS CR
TALLY L
JOHNSON CR
SMOKE CR
EAST SANKO CR
SANKO CR
REID CR
GRIFFIN CR
OETTIKER CR
TAYLOR CR
BILL CR
MOUTH
SPRING CR
UHITEFISH R
BEAVER CR
TOBIE CR
UNNAMED
LOGAN CR

L STILLUATER L
MARTIN CR

LE BEAU CR

U STILLUATER L

SPRING CR

SUNDAY CR

HUY 93 BRIDGE

HELLROARING CR

FITZSIMMONS CR

CHEPAT CR

RUSKY CR

MOUTH

LOUIS CR

HARVEY CR

PAUL CR

BLESSED CR

TOM CR

ADVENT CR

UHITEFISH L

ANT ICE CR

SWEDE CR

mUTH

MOUTH

UNNAMED

MOUTH

HEADWATERS

01100.00

GOOD CR

02400.00

EVERS CR

03200.00

TALLY L

03201.00

JOHNSON CR

03600.00

SMOKE CR

03601.00

EAST SANKO CR

03602.00

SANKO CR

03603.00

REID CR

03604.00

GRIFFIN CR

03605.00

OETTIKER CR

04200.00

TAYLOR CR

04201.00

BILL CR

04202.00

CYCLONE CR

04203.00

SPRING CR

00100.00

UHITEFISH R

00101.00

BEAVER CR

01400.00

TOBIE CR

01401.00

UNNAMED

01402.00

LOGAN CR

01403.00

L STILLUATER LK

01500.00

MARTIN CR

01501.00

LE BEAU CR

01600.00

U STILLUATER L

01601.00

SPRING CR

01601.13

SUNDAY CR

01602.00

HUY 93 BRIDGE

01/00.00

HELLROARING CR

01700.00

FITZSIMMONS CR

01701.00

CHEPAT CR

01900.00

RUSKY CR

01901.00

HEADUATERS

01902.00

LOUIS CR

02000.00

HARVEY CR

02001 .00

PAUL CR

02002.00

BLESSED CR

02003.00

TOM CR

02004.00

ADVENT CR

02005.00

HEADWATERS

02100.00

ANT ICE CR

00600.00

SWEDE CR

04300.00

SUIFT CR, E FK

04301 .00

HEADUATERS

00700.00

UNNAMED

00800.00

HEADUATERS

00900.00

ROSE XING BRIDGE

00200.00

STATUS OF BULL TROUT IN MONTANA
Sti I Iwater Drainage #17010210

Streams

Stream Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics
Rating

Habitat Risk
Rating

UHITEFISH R
UHITEFISH R
UHITEFISH R
UHITEFISH R
UHITEFISH R

ROSE XING BRIDGE
HODGSON ROAD BRIDGE
UALKER CR
HASKILL CR
COU CR

HODGSON ROAD BRIDGE
UALKER CR
HASKILL CR
COU CR
UHITEFISH L

00200.00
00200.00
00202.00
00203.00
00204.00

R
R
R
R
R

C
C
C
C
C

E
E
E
E

N
N
N
N
N

Lakes

Lake Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics
Rating

Habitat Risk
Rating

CYCLONE L
FROZEN L

MOUTH

NON_TRANSPORT REACH

U
U

A
A

A 6
A 6

LOUER STILLUATER L
TALLY L
TALLY L

MOUTH
MOUTH

NON TRANSPORT REACH
NON TRANSPORT REACH

03400.00
03500.00

U
U
U

A
A
A

E
E

B 9
B 9
B 9

UPPER UHITEFISH L
UHITEFISH L
UHITEFISH L
UHITEFISH L

MOUTH
MOUTH
MOUTH
MOUTH

NON_TRANSPORT REACH
NON TRANSPORT REACH
NON TRANSPORT REACH
NON_TRANSPORT REACH

00400.00
00500.00
04400.00

U
V
V
V

A
A
A
A

E
E
E

B 9
B 9
B 9
B 9

STATUS OF BULL TROUT IN MONTANA
Swan Drainage #17010211

Streams

stream Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

BEAVER CR
BETHEL CR
BUCK CR
CEDAR CR
COLD CR
COLD CR
COLD CR
COLD CR
COLD CR, N FK
COLD CR, S FK
COLD CR, S FK
COONEY CR
COONEY CR
DOG CR
DOG CR
DOG CR
ELK CR
ELK CR
ELK CR
ELK CR, N FK

ELK CR, N FK

ELK CR, S FK

GLACIER CR

GOAT CR

HOLLAND CR

JIM CR

LION CR

LOST CR

LOST CR, N FK

LOST CR, S FK

PIPER CR

S WOODWARD CR

SOUP CR

SQUEEZER CR

SWAN R

MOUTH

UNNAMED

04400.00

R J

MOUTH

HEADWATERS

10400.00

A Z

MOUTH

UNNAMED

08100.00

U Z

MOUTH

UNNAMED

07000.00

U J

MOUTH

COID CR, S FK

01500.00

V J

COLD CR, S FK

UNNAMED

01600.00

V J

UNNAMED

COLD CR, N FK

01601.00

V R

COLD CR. N FK

HEADWATERS

01800.00

V R

MOUTH

HEADWATERS

01700.00

C J

MOUTH

2.1 MILES ABOVE MOUT

01900.00

U Z

2.1 MI ABOVE MOUTH

HEADWATERS

01900.00

U Z

MOUTH

2.7 MILES ABOVE MOUT 08700.00

R J

2.7 MI ABOVE MOUTH

HEADWATERS

08700.00

R J

MOUTH

CAT CR

09600.00

R J

MOUTH

RD 3.3 MI ABOVE MOUT

09601 .00

R J

RD 3.3 MI ABOVE MOUT

HEADWATERS

09601.00

R J

MOUTH

5.4 MI ABOVE MOUTH

02100.00

V J

5.4 MI ABOVE MOUTH

HEADWATERS

02100.00

V J

UNNAMED

ELK CR, N FK

02101 .00

V J

MOUTH

.9 MILES ABOVE MOUTN

02200.00

V J

MOUTH

.9 MILES ABOVE MOUTH 02200.00

V J

.9 MI ABOVE MOUTH

ELK L

02300.00

U J

KRAFT CR

CRAZY HORSE CR

03100.00

A J

CRAZY HORSE CR

GLACIER L

03101 .00

C J

MOUTH

SQUEEZER CR

05000.00

V J

SQUEEZER CR

SCOUT CR

05200.00

V J

SCOUT CR

BETHEL CR

05201.00

V J

HOLLAND L

HEADWATERS

04900.00

V J

MOUTH

JIM CR, W FK

01300.00

U J

JIM CR, U FK

HEADWATERS

01301.00

U J

MOUTH

6 MILES ABOVE MOUTH

10200.00

V J

6 MILES ABOVE MOUTH

HEADWATERS

10200.00

V J

MOUTH

LOST CR, N FK

05500.00

U J

MOUTH

UNNAMED

05700.00

V J

UNNAMED

HEADWATERS

05701.00

R L

MOUTH

HEADWATERS

05600.00

V J

MOUTH

1.2 MILES ABOVE MOUT 07100.00

U J

1.2 MI ABOVE MOUTH

HEADWATERS

07100.00

U J

MOUTH

UNNAMED

01101.00

R >)

MOUTH

0.4 MILES ABOVE CAMP 05400.00

R Z

0.4 MI ABOVE CAMP

HEADWATERS

05400.00

R z

MOUTH

BRIDGE AT RM 4.0

05100.00

V J

BRIDGE AT RM 4.0

HEADWATERS

05100.00

V J

FLATHEAD L

MUD LAKE OUTLET

00100.00

U C

MUD LAKE OUTLET

WOLF CR

00200.00

U C

WOLF CR

BEAR CR

00201.00

u c

STATUS OF BULL TROUT IN MONTANA
Swan Drainage #17010211

Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat Risk

Rating

SWAN R

BEAR CR

SWAN L

00202.00

SWAN R

SWAN L

YEW CR

00700.00

SWAN R

YEW CR

LIME CR

00701.00

SWAN R

LIME CR

GILDART CR

00702.00

SWAN R

GILDART CR

LOST CR

00900.00

SWAN R

LOST CR

CILLY CR

00901.00

SWAN R

CILLY CR

SOUP CR

00902.00

SWAN R

SOUP CR

WHITETAIL CR

00903.00

SWAN R

WHITETAIL CR

SQUAW CREEK

01000.00

SWAN R

SOUAW CREEK

WOODWARD CR

01001.00

SWAN R

GOAT CR

CEDAR CR

01200.00

SWAN R

CEDAR CR

LION CR

01201.00

SWAN R

LION CR

PIPER CR

01202.00

SWAN R

PIPER CR

JIM CR

01203.00

SWAN R

JIM CR

ALDER CR

01400.00

SWAN R

ALDER CR

PONY CR

01400.13

SWAN R

PONY CR

CONDON CR

01401.00

SWAN R

CONDON CR

COLD CR

0140?. 00

SWAN R

COLO CR

ELK CR

02000.00

SWAN R

ELK CR

GLACIER CR

02400.00

SWAN R

GLACIER CR

COONEY CR

03200.00

SWAN R

COONEY CR

RUMBLE CR

03201.00

SWAN R

RUMBLE CR

BUCK CR

03202.00

SWAN R

BUCK CR

BARBER CR

03203.00

SWAN R

BARBER CR

HOLLAND CR

03204.00

SWAN R

HOLLAND CR

BEAVER CR

03300.00

SWAN R

BEAVER CR

LINDBERGH L

03400.00

SWAN R

WOODWARD CR

GOAT CR

06200.00

WOODWARD CR

MOUTH

S WOODWARD CR

01100.00

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

HOLLAND L

MOUTH

HOLLAND L

MOUTH

LINDBERGH L

MOUTH

LINDBERGH L

MOUTH

SWAN L

MOUTH

SWAN L

MOUTH

SWAN L

MOUTH

NON TRANSPORT REACH

04700.00

NON TRANSPORT REACH

04800.00

NON TRANSPORT REACH

03600.00

NON TRANSPORT REACH

03700.00

NON TRANSPORT REACH

00400.00

NON TRANSPORT REACH

00500.00

NON TRANSPORT REACH

00600.00

A
A
A
A
A
A
A

7
7
7
6
6
6

STATUS OF BULL TROUT IN MONTANA
Lower Flathead #17010212

Streams

stream Name

Lower Boundary

Upper Boundary

RRN i

^bundance Use

Genetics Habitat Risk

Rating

FLATHEAD

MOUTH

SEEPAY CR

00100.00

D 1

FLATHEAD

SEEPAY CR

CAMAS CR

00300.00

D 1

FLATHEAD

CAMAS CR

RACEHORSE GULCH

00400.00

D '

FLATHEAD

RACEHORSE GULCH

MAGPIE CR

00500.00

D 1

FLATHEAD

MAGPIE CR

REVAIS CR

00700.00

D 1

FLATHEAD

REVAIS CR

JOCKO R

00900.00

FLATHEAD

JOCKO R

MISSION CR

02500.00

FLATHEAD

MISSION CR

CROW CR

04000.00

FLATHEAD

CROW CR

LITTLE BITTERROOT R

05000.00

FLATHEAD

LITTLE BITTERROOT R

WHITE EARTH CR

05400.00

FLATHEAD

WHITE EARTH CR

FLATHEAD L

05700.00

JOCKO R

FINLEY CR

PISTOL CR

01600.00

JOCKO R

JOCKO R, M FK

JOCKO R, S FK

01700.00

JOCKO R

PISTOL CR

JOCKO R, M FK

02000.00

MISSION

DRY CR

HEADWATERS

03000.00

POST CR

UNNAMED

HEADWATERS

03200.00

Lakes

Lake Name

Lower Boundary

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

MCDONALD L
MISSION RES
ST MARY'S RES

V
R
R

A
A
A

B B 7
E N
E N

stream Name

Lower Boundary

STATUS OF BULL TROUT IN MONTANA
Lower Clark Fork #17010213
Streams

Upper Boundary

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

•

BULL R

MOUTH

BULL R, E FK

10300.00

BULL R

BULL R. E FK

BULL R, S FK

10500.00

BULL R, H FK

MOUTH

BULL R, N FK

10700.00

BULL R, M FK

BULL R, N FK

HEADWATERS

10800.00

BULL R, N FK

MOUTH

HEADWATERS

10900.00

BULL R, S FK

MOUTH

HEADWATERS

10600.00

CLARK FK R

DRY CR

ELK CR

00201.00

CLARK FK R

ELK CR

BIG EDDY CR

00400.00

CLARK FK R

BIG EDDY CR

BULL R

00401.00

CLARK FK R

BULL R

PILGRIM CR

00500.00

CLARK FK R

PILGRIM CR

ROCK CR

00700.00

CLARK FK R

ROCK CR

NOXON RES

00701.00

CLARK FK R

NOXON RES

BEAVER CR

02900.00

CLARK FK R

BEAVER CR

DEEP CR

03500.00

CLARK FK R

DEEP CR

MOSQUITO CR

03501.00

CLARK FK R

MOSQUITO CR

GRAVES CR

03502.00

CLARK FK R

GRAVES CR

SQUAW CR

03600.00

CLARK FK R

SQUAW CR

PROSPECT CR

03700.00

CLARK FK R

PROSPECT CR

CHERRY CR

04500.00

CLARK FK R

CHERRY CR

THOMPSON R

04700.00

CLARK FK R

THOMPSON R

EDDY CR

04800.00

CLARK FK R

EDDY CR

SWAMP CR

05000.00

CLARK FK R

SWAMP CR

BUFFALO BILL CR

05400.00

CLARK FK R

BUFFALO BILL CR

LYNCH CR

05500.00

CLARK FK R

LYNCH CR

COMBEST CR

05600.00

CLARK FK R

COMBEST CR

MCLAUGHLIN CR

06000.00

CLARK FK R

MCLAUGHLIN CR

FLATHEAD R

06100.00

COOPER GULCH

MOUTH

HEADWATERS

16900.00

CROW CR

MOUTH

CROW CR, E FK

17000.00

CROW CR, E FK

MOUTH

HEADWATERS

17200.00

ELK CR

MOUTH

ELK CR, W FK

00300.00

FISHTRAP CR

MOUTH

JUNGLE CR

09300.00

FISHTRAP CR

JUNGLE CR

BASIN CR

09301.00

FISHTRAP CR

BASIN CR

BEATRICE CR

09302.00

FISHTRAP CR

BEATRICE CR

FISHTRAP CR, W FK

09303.00

FISHTRAP CR

FISHTRAP CR, W FK

BEARTRAP FK

09400.00

GRAVES CR

MOUTH

THORNE CR

09800.00

GRAVES CR

THORNE CR

HEADWATERS

09801.00

LITTLE THOMPSON R

MOUTH

LITTLE ROCK CR

07400.00

LITTLE THOMPSON R

LITTLE ROCK CR

MUDD CR

07401.00

LITTLE THOMPSON R

MUDD CR

LITTLE THOMPSON R,

N 07600.00

LITTLE THOMPSON R

LITTLE THOMPSON R, N

MCGINNIS CR

07600.13

LITTLE THOMPSON R

MCGINNIS CR

ALDER CR

07601.00

LITTLE THOMPSON R

ALDER CR

HEADWATERS

07602.00

PILGRIM CR

MOUTH

HEADWATERS

00600.00

PROSPECT CR

MOUTH

DRY CR

03800.00

PROSPECT CR

DRY CR

CLEAR CR

03900.00

PROSPECT CR

CLEAR CR

WILKES CR

04100.00

PROSPECT CR
PROSPECT CR
PROSPECT CR
PROSPECT CR
ROCK CR
ROCK CR
ROCK CR, W FK
SWAMP CR
THOMPSON R
THOMPSON R

THOMPSON R

THOMPSON R, U FK

THOMPSON R, W FK

THOMPSON R, W FK
THOMPSON R, U FK
VERMILION R
VERMILION R
VERMILION R
VERMILION R

WILKES CR

BRUSH GULCH

DAISY CR

THERRIAULT GULCH

MOUTH

ROCK CR, U FK

MOUTH

NOXON RES

MOUTH

THOMPSON R, W FK

BAY STATE CR

BIG HOLE CR

DEERHORN CR

FISHTRAP CR

LITTLE THOMPSON R

BEAR CR

CHIPPY CR

BIG PRAIRIE CR

SEMEM CR

MEADOW CR

BIG ROCK CR

LAZIER CR

MOUTH

HONEYMOON CR

BIG SPRUCE CR

FOUR LAKES CR

ANNE CR

NOXON RES

CANYON CR

CATARACT CR

LYONS GULCH

BRUSH GULCH
DAISY CR
THERRIAULT GULCH
CROW CR
ROCK CR, W FK
HEADWATERS
HEADWATERS
GALENA CR
THOMPSON R, W FK
BAY STATE CR
BIG HOLE CR
DEERHORN CR
FISHTRAP CR
LITTLE THOMPSON R
BEAR CR
CHIPPY CR
BIG PRAIRIE CR
SEMEN CR
MEADOW CR
BIG ROCK CR
LAZIER CR
INDIAN CR
HONEYMOON CR
BIG SPRUCE CR
FOUR LAKES CR
ANNE CR
HEADWATERS
CANYON CR
CATARACT CR
LYONS GULCH
GROUSE CR

04200.00

04200.13

04201.00

04201.13

16300.00

16301.00

17800.00

10200.00

06500.00

06600.00

06800.00

07000.00

07200.00

07300.00

07700.00

07900.00

08100.00

08101.00

08102.00

08103.00

08300.00

08301.00

09600.00

09601.00

09601.13

09602.00

09603.00

10000.00

10000.13

10001.00

10002.00

V
V
V

V
V
V
V
V
V
V
V
V
V
V

c
c
c
c
c
c
c
c
c
c
c

B
B
B
B

C
C

N
B
B

8
8
8
8
11
11
11

8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

NOXON RES

MOUTH

NON TRANSPORT REACH 00900.00

STATUS OF BULL TROUT IN MOMTAMA
St. Mary Drainage #10010002
Streams

Stream Name

Lower Boundary

Upper Boundary

RRN Abundance Use

Genetics

Habitat Risk

Rating

BOULDER CR

MOUTH

HEADWATERS

02100.00

DIVIDE CR

MOUTH

HEADWATERS

04200.00

KENNEDY CR

MOUTH

OTATSO CR

01100.00

KENNEDY CR

OTATSO CR

HEADWATERS

01300.00

LEE CR

MOUTH

HEADWATERS

00200.00

OTATSO CR

MOUTH

HEADWATERS

01200.00

ST MARY R

BOUNDARY CR

UNNAMED

00900.00

ST MARY R

UNNAMED

KENNEDY CR

01000.00

ST MARY R

KENNEDY CR

SWIFT CURRENT CR

ouoo.oo

ST MARY R

SWIFT CURRENT CR

LOWER ST MARY L

02200.00

ST MARY R

LOWER ST MARY L

DIVIDE CR

02600.00

ST MARY R

DIVIDE CR

ST MARY L

02700.00

ST MARY R

ST MARY L

HEADWATERS

03900.00

ST MARY R

MOUTH

BOUNDARY CR

04700.00

•

Lake Name

Lower Boundary

Upper Boundary

Lakes

RRN

Abundance Use

Genetics Habitat Risk
Rating Rating

CRACKER L
LOWER ST MARY L
ST MARY L

NON_TRANSPORT REACH
NON TRANSPORT REACH

NON_TRANSPORT REACH 02400.00
NON TRANSPORT REACH 02900.00

A
Z

A
A
A

B
N
N

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